Each domain is transformed to a 0–100 scale (higher = better health). Scores nearer the radar center indicate relatively lower perceived health in that area.
This self-report tool does not diagnose disease. If any areas concern you or affect day-to-day life, consider discussing your results with a qualified health‑care professional.
| # | Item | Response |
|---|---|---|
| {{ a.id }} | {{ a.text }} | {{ a.answer }} |
Health related quality of life is a broad picture of how people feel and function in daily life. The SF‑36 summarizes this picture across eight areas so you can compare strengths and bottlenecks over time.
The survey reflects the past four weeks and turns everyday answers into clear scores. You respond to 36 questions and then read domain results on a 0 to 100 scale where higher means better health. A simple note highlights whether physical and mental summaries are similar or meaningfully different.
You provide one choice per item and the scoring updates when all answers are in. For example, stronger physical functioning with lower energy and fatigue suggests pacing tasks and adding short breaks so effort fits the day.
Use consistent recall windows and answer order if you plan to compare runs. Results can guide conversations and planning, yet they do not speak to diagnosis or treatment on their own.
This tool provides informational estimates and does not substitute professional advice.
The SF‑36 measures health‑related quality of life (HRQoL) as perceived status over the recent past. It summarizes eight domains: Physical Functioning, Role‑Physical, Pain, General Health, Emotional Well‑being, Role‑Emotional, Social Functioning, and Energy / Fatigue. Each domain aggregates several item responses captured on ordered categories.
Each item is transformed to a 0–100 scale so domain scores are directly comparable. Items that indicate better health with higher categories are scaled linearly; items whose higher categories indicate worse health are reverse‑scaled before aggregation.
Results include eight domain scores, a Physical summary (mean of Physical Functioning, Role‑Physical, Pain, General Health), a Mental summary (mean of Emotional Well‑being, Role‑Emotional, Social Functioning, Energy / Fatigue), and an overall mean across all domains. A balance note flags when Physical and Mental summaries differ by more than five points.
Comparisons are most meaningful within the same person using consistent timing and context. Population norms or clinically validated cut‑points are not applied by this implementation.
| Symbol | Meaning | Unit/Datatype | Source |
|---|---|---|---|
| v | Chosen category index for an item (1…n) | integer | Input |
| n | Number of categories for the item | integer | Constant (per item) |
| r | Reverse‑scoring flag (1 yes, 0 no) | boolean | Constant (per item) |
| t | Transformed item score | points (0–100) | Derived |
| Sd | Domain score (mean of item scores in domain d) | points (0–100) | Derived |
| Sphys, Sment | Physical and Mental summaries (means of their domain sets) | points (0–100) | Derived |
| Mean | Overall mean across the eight domain scores | points (0–100) | Derived |
Worked example. A 5‑category item with higher meaning better health (r=0), chosen category v=3:
Reverse‑scored 5‑category item (r=1), v=4:
If a domain contains item scores 40, 60, and 80, its mean is 60 points, indicating moderate perceived health in that area.
| Threshold Band | Lower Bound | Upper Bound | Interpretation | Action Cue |
|---|---|---|---|---|
| Balanced | −5 | +5 | Physical and Mental summaries are similar. | Track over time for stability. |
| Physical lean | +5.1 | − | Physical summary exceeds Mental by >5 points. | Review mood, stress, and social supports. |
| Mental lean | − | −5.1 | Mental summary exceeds Physical by >5 points. | Consider pacing and physical limitations. |
Item transforms and all aggregates are reported in points on a 0–100 scale. Values are rounded to one decimal place using the locale’s decimal separator.
| Field | Type | Min | Max | Step/Pattern | Error Text | Placeholder |
|---|---|---|---|---|---|---|
Encoded responses (r) |
string | 36 chars | 36 chars | ^[0-6\-]{36}$ |
None | 36 dashes |
| Input | Accepted Families | Output | Encoding/Precision | Rounding |
|---|---|---|---|---|
| Survey responses | Radio selections across 36 items | Eight domain scores, summaries, overall mean | 0–100 points, one decimal | Locale‑aware to one decimal |
| Answer exports | Copy or download | Tabular answers and summary header | CSV or DOCX | As displayed |
Processing is client‑only. Responses are kept on the device. An encoded 36‑character string can be placed in the URL to reload answers; sharing that link shares the encoded responses.
Computation is linear in the number of items and deterministic. Identical inputs yield identical scores and visualizations.
Avoid sharing links that include encoded answers if privacy is a concern. Do not paste sensitive personal details into text fields when exporting.
r strings are ignored instead of partially applied.Design and terminology follow the RAND SF‑36 family of instruments and common SF‑36 scoring references used in health outcomes research.
No data is transmitted or stored server‑side. For sensitive use, review applicable privacy guidance and share encoded links only with intended recipients.
The SF‑36 captures perceived health across eight domains and returns comparable 0–100 scores.
Example: After completing all items, Physical summary 62 and Mental summary 58 indicates broadly similar status. Track again next month.
No. Answers remain on your device. An encoded string in the address can reload responses if you choose to share it.
Avoid sharing links if privacy is required.They reflect your self‑reported status, scaled to 0–100 using standard linear transforms. Small rounding to one decimal is applied.
Use consistent conditions when comparing runs.All outputs are points on a 0–100 scale. Higher values indicate better perceived health.
Displays use your locale’s decimal separator.Yes, once loaded. Scoring runs on the device and does not require a connection.
Reloading external resources may require connectivity.No charges are applied by this app.
Licensing of the underlying instrument may apply elsewhere.A difference within five points between Physical and Mental summaries suggests broadly similar status. Larger gaps highlight an area to review first.
Use judgment and context when interpreting gaps.Use the export options for answers. You can also share a link that includes the encoded response string if you choose.
Anyone with the link can view encoded responses.