Student Name
Purdue University Global
NU552 Advanced Health Assessment and Diagnostic Reasoning
Prof. Name:
Date
Accurate documentation of subjective information is the foundation of a comprehensive health assessment. By collecting a detailed patient history, conducting a structured health interview, completing a thorough Review of Systems (ROS), and organizing findings into a SOAP note, healthcare providers can identify patient concerns, develop appropriate differential diagnoses, and create evidence-based plans of care. A systematic approach not only improves diagnostic accuracy but also promotes patient-centered communication, continuity of care, and clinical decision-making in advanced nursing practice.
The subjective health assessment involves collecting information that the patient reports about their health, symptoms, lifestyle, and medical history before performing a physical examination. Unlike objective findings, subjective data cannot be directly measured or observed by the clinician. Instead, it is obtained through effective communication and active listening.
A structured interview provides a consistent framework for gathering relevant information while building trust between the healthcare provider and the patient. Using open-ended questions encourages patients to describe their concerns in their own words, while follow-up questions help clarify important details that may influence diagnosis and treatment.
For nursing students completing an advanced health assessment, interviewing a volunteer family member or friend provides an opportunity to practice comprehensive documentation and clinical reasoning using standardized assessment techniques.
Key Point:Â The subjective assessment establishes the clinical foundation for diagnosis, guides the physical examination, and supports the development of an individualized care plan.
A thorough health history interview should follow a logical sequence to ensure that no essential information is overlooked. Before collecting patient information, document the date of the assessment, identify the source of the information, and indicate whether the patient appears to be a reliable historian.
Healthcare providers should create a comfortable environment, maintain patient privacy, and use therapeutic communication techniques throughout the interview. Establishing rapport often leads to more accurate and complete responses.
Biographical information provides valuable demographic and social context that may influence a patient’s health risks, communication needs, and treatment decisions. Record only patient initials to protect confidentiality.
The health history should include:
Patient initials
Primary language
Age and date of birth
Place of birth
Gender identity
Race
Marital status
Ethnic or cultural background
Highest level of education completed
Occupation or profession
Type of health insurance (private, commercial, state, or federal)
These details help clinicians recognize cultural considerations, socioeconomic influences, and potential barriers to healthcare access while supporting individualized care planning.
The Chief Complaint (CC) is the patient’s primary reason for seeking medical care. Whenever possible, document the complaint using the patient’s exact words to preserve accuracy and reduce interpretation bias.
A well-written chief complaint should briefly identify:
The primary symptom or concern
When the problem began
The reason the patient is seeking care today
For example:
“I’ve had chest pain for the past two hours.”
Using the patient’s own language improves communication among healthcare professionals and provides a clear starting point for further assessment.
Clinical Insight:Â A concise, patient-centered chief complaint guides the History of Present Illness and focuses subsequent clinical evaluation.
The History of Present Illness (HPI) provides a chronological narrative describing the patient’s current health concern from the onset of symptoms to the present encounter. An effective HPI captures symptom progression, associated factors, previous interventions, and the impact of the illness on daily functioning.
One of the most widely accepted methods for organizing the HPI is the OLD CARTS framework.
| Component | Assessment Focus |
|---|---|
| O – Onset | When did the symptoms begin? |
| L – Location | Where is the symptom located? |
| D – Duration | How long have the symptoms been present? |
| C – Characteristics | What does the symptom feel or look like? |
| A – Aggravating/Alleviating Factors | What makes the symptoms better or worse? |
| R – Radiation | Does the symptom spread to another area? |
| T – Timing | Is there a pattern or specific frequency? |
| S – Severity | How severe is the symptom on a scale of 0–10, and how does it affect daily life? |
In addition to these elements, patients should be asked about their perception of the illness by using questions such as:
“What do you think is causing this problem?”
Understanding the patient’s perspective provides valuable insight into health beliefs, expectations, and concerns that may influence treatment adherence and shared decision-making.
Rather than documenting each OLD CARTS component separately, synthesize the information into a clear narrative paragraph that tells the story of the patient’s illness in chronological order.
Clinical Insight:Â A complete HPI improves diagnostic accuracy by identifying symptom patterns, risk factors, and the overall impact of the condition on the patient’s quality of life.
A comprehensive Past Medical History (PMH) identifies previous illnesses, surgeries, treatments, and preventive healthcare measures that may contribute to the patient’s current condition. Reviewing past medical events helps clinicians recognize chronic diseases, recurring health problems, and potential risk factors.
Include information related to:
Chronic and acute medical conditions
Childhood illnesses such as measles, mumps, rubella, varicella, pertussis, and streptococcal infections
Previous surgeries and dates performed
Hospital admissions
Blood transfusions
Obstetric and gynecological history, when appropriate
Immunization status
Psychiatric history
Medication allergies and associated reactions
Current prescription medications
Over-the-counter medications
Vitamins, herbal products, and dietary supplements
Preventive health screenings and routine examinations
Preventive screening history may include physical examinations, vision and dental evaluations, hearing assessments, electrocardiograms (ECGs), chest radiographs, cervical cancer screening, mammography, lipid testing, colorectal cancer screening, prostate examinations, prostate-specific antigen (PSA) testing, urinalysis, and tuberculosis screening.
Documenting preventive care provides insight into the patient’s long-term health maintenance and identifies opportunities for preventive interventions.
A detailed Family History (FHx) helps identify hereditary conditions, familial disease patterns, and genetic predispositions that may increase the patient’s risk of developing certain illnesses.
Assess the health status of immediate and extended family members, including parents, grandparents, siblings, spouse, and children.
For each family member, document:
Current age or age at death
Living or deceased status
Major chronic illnesses
Genetic disorders
Communicable diseases
Significant causes of death, when applicable
Recognizing inherited conditions such as hypertension, diabetes mellitus, cardiovascular disease, cancer, and autoimmune disorders allows clinicians to recommend appropriate screening and preventive strategies.
Key Point:Â Family history is an essential component of risk assessment and supports early identification of hereditary health conditions.
Lifestyle behaviors, environmental exposures, and psychosocial factors significantly influence overall health and disease progression. A comprehensive assessment extends beyond physical symptoms to evaluate the patient’s daily routines, personal habits, and social circumstances.
Areas commonly explored include:
Immigration and travel history
Religious, spiritual, and cultural beliefs
Personal perception of health
Nutritional habits and fluid intake
Bowel and bladder function
Home environment and living arrangements
Occupational history and workplace exposures
Activities of Daily Living (ADLs)
Instrumental Activities of Daily Living (IADLs)
Family relationships and support systems
Cognitive functioning
Sleep quality and duration
Exercise habits and physical activity
Recreational interests
Tobacco use
Alcohol consumption
Recreational or illicit drug use
Sexual and reproductive health
Screening for intimate partner violence
Stress levels and coping strategies
Evaluating these factors helps identify social determinants of health, behavioral risks, and psychosocial influences that may affect treatment outcomes. Incorporating lifestyle information into the health assessment supports holistic, patient-centered care and facilitates individualized health promotion strategies.
Subjective assessment provides the foundation for clinical reasoning and guides the physical examination.
A structured health history improves documentation accuracy and reduces the likelihood of missing clinically significant information.
Using the OLD CARTS framework ensures a comprehensive evaluation of the patient’s presenting complaint.
Past medical, family, and lifestyle histories help identify risk factors that influence diagnosis, treatment planning, and preventive care.
Effective therapeutic communication encourages patient engagement and improves the quality of subjective data collected.
The Review of Systems (ROS) is a structured, head-to-toe assessment that identifies symptoms the patient has experienced across all major body systems. Unlike the physical examination, the ROS is based entirely on the patient’s self-reported information. It complements the History of Present Illness (HPI) by uncovering additional symptoms that may not have been discussed during the chief complaint.
A thorough ROS helps healthcare providers recognize comorbid conditions, identify previously unreported health concerns, and develop accurate differential diagnoses. Document both pertinent positives (symptoms the patient reports) and pertinent negatives (important symptoms the patient denies) to provide a complete clinical picture.
Clinical Insight:Â A systematic Review of Systems improves diagnostic accuracy by identifying symptoms that may affect multiple organ systems and influence clinical decision-making.
Begin the ROS by evaluating the patient’s overall health status. General symptoms often provide valuable clues about underlying systemic conditions.
Assess for:
Recent weight gain or weight loss
Fever or chills
Fatigue
Generalized weakness
Night sweats
Example of a Pertinent Negative
Denies fever, fatigue, weakness, night sweats, or recent weight changes.
Example of a Pertinent Positive
Reports an unintentional 10-pound weight gain over the past two months accompanied by persistent fatigue but denies fever or chills.
Skin findings frequently reflect both localized dermatologic disorders and systemic diseases. Obtain information about recent or chronic skin changes.
Assess for:
Rashes
Lesions
Itching (pruritus)
Dryness
Changes in skin color
Hair loss or texture changes
Nail abnormalities
Document the onset, duration, location, severity, and progression of any skin symptoms.
Evaluate symptoms related to the head and neurological function.
Assess for:
Headaches
Head injuries
Dizziness
Vertigo
Loss of consciousness
Clarify the frequency, duration, severity, and any associated neurological symptoms when abnormalities are reported.
Visual symptoms may indicate ophthalmic disorders or systemic diseases such as diabetes and hypertension.
Assess for:
Vision changes
Blurred or double vision (diplopia)
Eye pain
Redness
Swelling
Excessive tearing
Scotomas (visual field defects)
Use of corrective lenses
Date of the last eye examination
Include any history of glaucoma, cataracts, or previous eye surgery when applicable.
A comprehensive ear assessment evaluates hearing function and identifies conditions affecting balance or auditory health.
Assess for:
Hearing loss
Ear pain
Tinnitus
Ear infections
Ear drainage
Use of hearing aids
Document whether symptoms affect one or both ears and whether hearing impairment interferes with daily activities.
Nasal and sinus symptoms often contribute to respiratory complaints or allergic conditions.
Assess for:
Nasal congestion
Allergies
Nosebleeds (epistaxis)
Sinus pressure or pain
Nasal discharge
Changes in the sense of smell
Record the duration of symptoms and any seasonal or environmental triggers.
Oral health significantly influences nutrition, communication, and overall well-being.
Assess for:
Dental problems
Bleeding gums
Mouth ulcers
Dry mouth
Hoarseness
Sore throat
Denture use
Date of the last dental examination
Poor oral health may increase the risk of systemic diseases, making this assessment particularly important.
Neck symptoms may indicate musculoskeletal, endocrine, infectious, or lymphatic disorders.
Assess for:
Neck pain
Stiffness
Swollen lymph nodes
Thyroid enlargement (goiter)
Limited range of motion
Document associated neurological symptoms when present.
Breast assessment should include routine screening practices and any current concerns.
Assess for:
Breast pain
Lumps
Nipple discharge
Skin changes
Previous breast disease
Self-breast examination practices
Mammography history
Axillary tenderness or swelling
When appropriate, include gender-specific recommendations based on current screening guidelines.
Respiratory symptoms provide important information about pulmonary function and underlying cardiopulmonary disease.
Assess for:
Cough
Sputum production
Hemoptysis
Shortness of breath (dyspnea)
Wheezing
Chest discomfort associated with breathing
Previous lung disease
Occupational or environmental exposures
Tuberculosis testing
Previous chest imaging
Characterize cough by onset, duration, sputum color, and aggravating factors.
Cardiovascular assessment identifies symptoms associated with heart disease and circulatory disorders.
Assess for:
Chest pain
Palpitations
Orthopnea
Peripheral edema
Cyanosis
Hypertension
Coronary artery disease
Heart murmurs
Clarify the characteristics of chest pain using the OLD CARTS framework whenever cardiac symptoms are reported.
A gastrointestinal assessment evaluates digestive function and identifies symptoms affecting nutritional status.
Assess for:
Appetite changes
Difficulty swallowing (dysphagia)
Heartburn
Nausea
Vomiting
Abdominal pain
Constipation
Diarrhea
Rectal bleeding
Food intolerances
Include bowel habits, stool characteristics, and recent gastrointestinal procedures when appropriate.
The genitourinary assessment identifies urinary and reproductive health concerns.
Assess for:
Urinary frequency
Painful urination (dysuria)
Blood in the urine (hematuria)
Urgency
Nocturia
Urinary incontinence
When appropriate, obtain a gender-specific reproductive history, including menstrual history, pregnancy history, contraceptive use, menopause status, or prostate-related symptoms.
Peripheral vascular symptoms may indicate circulatory disorders affecting the extremities.
Assess for:
Claudication
Cold hands or feet
Varicose veins
Blood clots
Numbness
Non-healing ulcers
Swelling of the extremities
These findings help identify peripheral arterial or venous disease.
Evaluate the patient’s mobility and musculoskeletal function.
Assess for:
Joint pain
Muscle pain
Muscle cramps
Arthritis
Gout
Reduced range of motion
Joint swelling
Document whether symptoms interfere with work, exercise, or activities of daily living.
Neurological symptoms help identify disorders involving the brain, spinal cord, or peripheral nerves.
Assess for:
Syncope
Seizures
Weakness
Tremors
Stroke history
Memory loss
Coordination problems
Mood or behavioral changes
Assess symptom onset, progression, and associated neurological deficits when abnormalities are reported.
Hematologic assessment evaluates blood disorders and immune-related conditions.
Assess for:
Anemia
Easy bruising
Excessive bleeding
Blood transfusions
Enlarged lymph nodes
Exposure to toxic substances
Document any history of clotting disorders or hematologic malignancies.
Endocrine disorders often present with generalized symptoms affecting multiple body systems.
Assess for:
Heat intolerance
Cold intolerance
Excessive sweating
Polyuria
Polydipsia
Polyphagia
Diabetes mellitus
Thyroid disorders
Hormone replacement therapy
These symptoms may indicate metabolic or hormonal abnormalities requiring further evaluation.
Mental health is an essential component of a comprehensive health assessment.
Assess for:
Anxiety
Depression
Mood disorders
Memory impairment
Previous psychiatric diagnoses
Hospitalizations for mental illness
Suicide attempts or suicidal ideation
Evaluate how emotional or psychological symptoms affect daily functioning, interpersonal relationships, and quality of life.
Clinical Insight:Â Screening for mental health concerns during the health history promotes early identification, timely intervention, and holistic patient care.
After completing the subjective interview and physical examination, synthesize the collected information into a clinical assessment. This step involves analyzing the patient’s history, reported symptoms, examination findings, and available diagnostic evidence to determine the most likely diagnosis.
The assessment should include:
Primary diagnosis:Â The condition that best explains the patient’s presentation.
Differential diagnoses:Â Other potential conditions with similar clinical features.
Rule-in diagnoses:Â Conditions supported by the available evidence.
Rule-out diagnoses:Â Conditions that require additional testing before being excluded.
Every diagnosis should be supported by objective evidence and clinical reasoning rather than assumptions. Organizing diagnoses in this manner improves diagnostic accuracy and supports evidence-based decision-making.
The Plan section of a SOAP note outlines the interventions required to address the patient’s health concerns. Every recommendation should directly relate to the assessment findings and promote patient-centered care.
An effective plan of care typically includes:
Recommended laboratory studies and diagnostic imaging
Medication initiation, adjustment, or continuation
Patient education regarding the diagnosis and treatment
Lifestyle modifications to reduce risk factors
Preventive health recommendations
Follow-up appointments
Referrals to specialists or interdisciplinary healthcare providers when indicated
A well-developed plan promotes continuity of care, improves patient outcomes, and ensures that treatment decisions are supported by current clinical evidence.
The following example demonstrates how subjective and objective findings can be organized into the SOAP (Subjective, Objective, Assessment, and Plan) format. Using a standardized SOAP note improves clinical communication, supports continuity of care, and provides a clear rationale for diagnosis and treatment planning.
Chief Complaint (CC)
“I have had an itchy, scaly rash on my scalp and knees for about two weeks. The rash has spread to my face, and I avoid going outside because I feel people are staring at me. I have also been having trouble sleeping, eating, and concentrating.”
History of Present Illness (HPI)
A 30-year-old White female presents with a two-week history of an intensely pruritic, erythematous, scaly rash involving the scalp and both knees. She reports experiencing similar episodes in the past; however, previous flare-ups were less severe and did not affect the scalp. Since the onset of her current symptoms, she has experienced persistent itching that interferes with sleep and daily activities. The visible lesions have also caused emotional distress, decreased appetite, impaired concentration, and social withdrawal. She denies exposure to new soaps, detergents, medications, or known allergens.
Past Medical History
The patient’s medical history includes:
Hypertension
Allergic rhinitis
Total hysterectomy performed for uterine fibroids
Current Medications
Lisinopril 20 mg orally once daily
Loratadine 10 mg orally once daily
Allergies
No known drug allergies (NKDA).
Family History
Mother: Hypertension
Brother: Hypertension
No known family history of autoimmune skin disorders.
Social History
The patient lives with her spouse and two children and is employed as a bank teller. She denies tobacco use, alcohol consumption, recreational drug use, or any history of physical, emotional, or sexual abuse.
Review of Systems
Skin:Â Reports thick, scaly plaques involving the scalp and bilateral knees with persistent itching. Denies changes in hair growth, nail abnormalities, or suspicious skin lesions.
Psychiatric:Â Reports poor sleep, decreased appetite, reduced concentration, embarrassment related to the rash, and social isolation. Denies suicidal or homicidal ideation.
Alert, cooperative, and oriented to person, place, time, and situation. The patient appears well-groomed and in no acute distress.
Blood Pressure: 128/72 mmHg
Heart Rate: 70 beats/minute
Respiratory Rate: 18 breaths/minute
Temperature: 98.7°F (37.1°C)
Height: 5 ft 7 in
Weight: 168 lb
Body Mass Index (BMI): 26.3 kg/m²
Skin
Warm and dry with well-demarcated erythematous plaques covered by silvery scales on the bilateral knees and frontal scalp. No evidence of secondary infection or drainage.
HEENT
Pale, boggy nasal mucosa with mild postnasal drainage. Oral mucosa is moist without lesions.
Respiratory
Breath sounds are clear bilaterally with mild end-expiratory wheezing. Respirations are even and unlabored.
Cardiovascular
Regular heart rate and rhythm without murmurs, gallops, or rubs. Peripheral pulses are palpable and symmetrical.
Neurological
Alert and oriented ×4. Cranial nerves II–XII are intact. Motor strength and sensation are within normal limits.
Based on the patient’s history and physical examination, the most likely diagnosis is plaque psoriasis, supported by recurrent erythematous plaques with characteristic silvery scales involving the scalp and extensor surfaces.
Plaque Psoriasis
Supporting Findings
Recurrent scaly plaques
Bilateral knee involvement
Scalp lesions
Persistent pruritus
Previous similar episodes
Absence of infectious findings
Seborrheic dermatitis
Atopic dermatitis (eczema)
Tinea corporis
Contact dermatitis
Cutaneous lupus erythematosus
Adjustment disorder with depressed mood related to chronic dermatologic disease
Allergic rhinitis
Essential hypertension
Clinical Insight:Â Developing differential diagnoses ensures that alternative conditions are considered before confirming the final diagnosis, reducing the risk of diagnostic error.
Recommended diagnostic studies include:
Complete Blood Count (CBC)
Erythrocyte Sedimentation Rate (ESR)
C-Reactive Protein (CRP)
Vitamin D level
Skin biopsy if the diagnosis remains uncertain following clinical evaluation
Initiate evidence-based treatment consisting of:
High-potency topical corticosteroid (e.g., clobetasol)
Vitamin D analogue (e.g., calcipotriol)
Daily emollient therapy to improve skin hydration
Hydroxyzine for pruritus and sleep disturbance when clinically appropriate
Continue antihistamine therapy and intranasal corticosteroid for allergic rhinitis
Educate the patient regarding:
The chronic and relapsing nature of psoriasis
Medication adherence
Proper application of topical medications
Daily skin moisturization
Trigger avoidance, including excessive stress, skin trauma, and smoking
Recognition of symptoms requiring prompt medical attention
Encourage lifestyle modifications that support symptom control and overall health, including:
Stress management techniques
Adequate sleep
Balanced nutrition
Regular physical activity
Gentle skincare practices
Avoidance of harsh soaps and skin irritants
Schedule a follow-up appointment within 2 to 4 weeks to evaluate treatment response and symptom improvement. Referral to a dermatologist should be considered if lesions worsen, fail to respond to topical therapy, or if systemic treatment becomes necessary.
Accurate subjective documentation forms the basis of advanced health assessment and clinical decision-making. A comprehensive patient interview, detailed health history, systematic Review of Systems, and well-structured SOAP note enable healthcare providers to identify health concerns, prioritize physical examination findings, develop evidence-based differential diagnoses, and create individualized treatment plans.
Using structured assessment tools such as the OLD CARTS framework promotes consistency in documentation while improving communication among healthcare professionals. Comprehensive SOAP notes also enhance continuity of care by ensuring that patient information is organized, clinically relevant, and easily accessible throughout the healthcare continuum.
What is the purpose of a subjective health assessment?
A subjective health assessment gathers information directly from the patient regarding symptoms, medical history, medications, lifestyle, and health concerns. This information guides physical examination, clinical reasoning, and treatment planning.
Why is the OLD CARTS framework important?
OLD CARTS provides a structured method for evaluating symptoms by assessing onset, location, duration, characteristics, aggravating or alleviating factors, radiation, timing, and severity. It improves documentation accuracy and supports differential diagnosis.
Why is the Review of Systems (ROS) necessary?
A comprehensive ROS identifies symptoms affecting multiple body systems, uncovers previously unreported health issues, and strengthens diagnostic accuracy by supporting comprehensive clinical assessment.
What are the four components of a SOAP note?
SOAP documentation consists of:
Subjective findings
Objective findings
Assessment
Plan
This standardized format promotes effective communication among healthcare professionals and supports continuity of patient care.
Subjective data consists of information reported directly by the patient, including symptoms, medical history, lifestyle habits, and personal concerns. Objective data includes measurable findings obtained through physical examination, diagnostic testing, and clinical observation.
OLD CARTS ensures clinicians collect complete information about a patient’s symptoms in a consistent manner. By evaluating symptom onset, location, duration, characteristics, aggravating or relieving factors, radiation, timing, and severity, healthcare providers can develop more accurate diagnoses and treatment plans.
Family history helps identify inherited conditions and genetic risk factors such as hypertension, diabetes, cardiovascular disease, autoimmune disorders, and certain cancers. This information supports preventive screening and individualized patient care.
A complete ROS should assess every major body system, including general health, skin, HEENT, respiratory, cardiovascular, gastrointestinal, genitourinary, musculoskeletal, neurological, endocrine, hematologic, peripheral vascular, and psychiatric systems while documenting both pertinent positives and pertinent negatives.
Differential diagnoses allow clinicians to compare multiple possible conditions before confirming the final diagnosis. This systematic approach minimizes diagnostic errors and ensures appropriate testing and evidence-based management.
SOAP notes organize clinical information into a standardized format that improves communication among healthcare professionals, supports evidence-based decision-making, facilitates continuity of care, and provides a clear record of patient assessment and treatment.
Comprehensive subjective documentation is a critical component of advanced nursing practice. Collecting an accurate health history, performing a systematic Review of Systems, documenting findings using the SOAP format, and applying structured assessment tools such as OLD CARTS strengthen clinical reasoning and support evidence-based care. Consistent documentation practices improve diagnostic accuracy, enhance interdisciplinary communication, and contribute to safer, patient-centered healthcare across diverse clinical settings.
American Academy of Dermatology Association. (2024). Psoriasis: Diagnosis and treatment. https://www.aad.org/public/diseases/psoriasis
American Psychiatric Association. (2022). Diagnostic and statistical manual of mental disorders (5th ed., text rev.; DSM-5-TR). https://www.psychiatry.org/psychiatrists/practice/dsm
Ball, J. W., Dains, J. E., Flynn, J. A., Solomon, B. S., & Stewart, R. W. (2023). Seidel’s guide to physical examination: An interprofessional approach (10th ed.). Elsevier. https://www.us.elsevierhealth.com/
Bickley, L. S. (2025). Bates’ guide to physical examination and history taking (14th ed.). Wolters Kluwer. https://shop.lww.com/
Jarvis, C. (2024). Physical examination and health assessment (10th ed.). Elsevier. https://evolve.elsevier.com/
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