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The gauge keeps the official ISI total on the original 0 to 28 scale. Use it with the band boundary notes and item review below; the ISI is interpreted as one screening score rather than a set of official subscales.
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These items are carrying the most weight on this run. They are practical review cues, not official ISI subscales.
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This secondary chart keeps every ISI item on the original 0 to 4 scale so the higher-intensity contributors and lower-intensity anchors stay visible in one place.
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ISI is interpreted as one total score. This comparison only shows which prompts were more or less endorsed on this run.
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{{ formattedJson }}Insomnia is not just a bad night here and there. It is a pattern of trouble falling asleep, staying asleep, or waking too early that starts to matter because it affects mood, daytime function, concentration, or the sense that sleep has stopped being restorative. The Insomnia Severity Index, or ISI, is one of the common short questionnaires used to turn that recent burden into a structured score.
This assessment follows that basic job closely. It asks the seven ISI items for the last 2 weeks, scores each item from 0 to 4, and returns a total from 0 to 28 with a severity band, a gauge, and a set of plain-language result notes that make the score easier to read.
That is most useful when sleep problems feel real but vague. One person may mainly struggle with sleep onset, another may be sleeping but feeling daytime fallout, and another may be mostly distressed by the problem itself. A single total score is helpful, but seeing which parts of the questionnaire are pushing the score upward is often what makes the result actionable.
This bundle adds that extra context by separating a night subtotal, a day subtotal, a simple pattern label for the highest night-time difficulty, and a short guidance section tied to the score profile. Those additions do not replace the ISI total. They make it easier to see where the burden is landing right now.
The result is still a screening view, not a diagnosis. Scoring happens in the browser, but the page also writes an encoded response string into the URL as you answer. That means the answers stay off a helper endpoint, yet a saved or shared link can still carry your response state with it.
The questionnaire is meant to reflect the last 2 weeks, so the best answers come from your usual pattern over that period rather than the very best night or the very worst one. If you answer from a single rough evening, the score becomes a story about that one night instead of a picture of the recent sleep problem.
The seven questions move from core night-time symptoms into satisfaction, daytime interference, noticeability to others, and worry or distress. That progression matters because insomnia burden is not only about sleep quantity. It is also about what the problem is doing to daily life and how much mental space it is taking up.
Once all seven items are answered, the page shows the total band first, then a set of overview cards, a gauge, a summary block, and your answer table. It also highlights higher-scored items against lower-scored anchors so you can tell whether the problem looks concentrated in a few places or spread across the whole questionnaire.
The derived night and day subtotals are especially useful when the overall total lands near a band boundary. A modest total with a noticeably higher night subtotal can point toward a sleep-initiation or sleep-maintenance pattern. A similar total with a heavier day subtotal may tell you that the main burden is showing up after the night is over.
r parameter.The core scoring follows the familiar ISI structure: seven self-ratings, each scored from 0 to 4, are summed into a total from 0 to 28. The implemented severity bands are 0 to 7 for No Clinically Significant, 8 to 14 for Subthreshold, 15 to 21 for Clinical Moderate, and 22 to 28 for Clinical Severe. Those cut points align with standard ISI interpretation, while the exact band wording mirrors this bundle's result labels.
The page then adds a second layer of interpretation that is specific to this tool. Items 1 to 3 are combined into a night subtotal, and items 5 to 7 are combined into a day subtotal. Item 4 remains the satisfaction item and item 7 is also surfaced separately as a distress signal. These derived views are not a replacement scoring system from the original questionnaire. They are a local reading aid added to make the pattern easier to understand.
Each subtotal is also given a coarse label of none, mild, moderate, or severe by dividing its 0 to 12 range into four quartile-like bands. The page then checks which of the first three items is highest. If the highest night-time item is at least moderate, that item becomes the dominant pattern label. If all three night-time items are below moderate, the page instead labels the profile as low night-time symptom burden.
The guidance block is driven by the score profile rather than by external history. It builds next-step suggestions from the overall band, the strongest night-time pattern, the day subtotal, and the distress score. Higher-scored items are treated as likely drivers, while items scored 0 or 1 are treated as current strengths or anchors. The purpose is not to practice medicine. It is to turn the completed questionnaire into a more legible snapshot.
| Measure | How it is calculated | What it is used for |
|---|---|---|
| Total score | Sum of all seven item ratings | Main ISI severity band from 0 to 28 |
| Night subtotal | Items 1 to 3 | Shows how much of the burden is concentrated in night-time symptoms |
| Day subtotal | Items 5 to 7 | Shows how much of the burden is reflected in daytime impact and concern |
| Satisfaction | Item 4 mapped from very satisfied to very dissatisfied | Separates subjective satisfaction from the subtotal views |
| Pattern label | Highest of items 1 to 3 if at least 2; otherwise low night-time symptom burden | Summarizes the dominant night-time complaint |
The result screen is deterministic. Identical answers produce the same total, the same band, the same gauge value, and the same guidance text. There is no remote scoring service and no browser storage in the package code. The only persistence path is the encoded r parameter in the URL, which the page can decode later to restore progress or redraw a completed result.
One important limitation follows from that design. Because the answers live in the URL rather than in protected local storage, privacy depends on what you do with the link. Browser history, copied links, screenshots, embed previews, and shared URLs can all expose the encoded response pattern even though the scoring itself stays in the browser.
A low score does not mean every aspect of sleep is ideal, and a high score does not explain the cause. The first question is how severe the recent burden looks on the total scale. The second question is where that burden is concentrated.
Scores from 0 to 7 fall in the lowest band and suggest little current insomnia burden on this questionnaire. Scores from 8 to 14 suggest subthreshold symptoms. Scores from 15 upward indicate a more clearly clinical level of burden on the ISI scale, with the highest band starting at 22. If your result sits close to a threshold, it is worth paying attention to the shape of the item profile instead of reacting only to the label.
The added night and day subtotals can clarify that shape. A higher night subtotal means the first three sleep-symptom items are carrying more of the total. A higher day subtotal means the later impact and concern items are heavier. A small difference of 2 points or less is treated by the page as a balanced profile, while a larger gap is labeled in the direction of the heavier side.
| Pattern | How to read it |
|---|---|
| Lower total with one elevated night item | The burden may be localized rather than broadly severe, even if one symptom feels prominent. |
| Subthreshold total with heavier day subtotal | The recent effect on daily life may be more noticeable than the night-time symptom count alone suggests. |
| Moderate or severe total with several items scored 3 or 4 | The questionnaire is describing a broad recent burden rather than a single isolated complaint. |
| High distress with a middling total | The emotional load of the sleep problem may deserve attention even if the total is not in the highest band. |
Because the ISI is a self-report screen, interpretation should stay humble. Sleep apnea, pain, medication effects, depression, shift-work disruption, alcohol use, and many other issues can influence how the same total should be understood. The score tells you how much recent burden is being reported, not why it is happening.
Example 1: mostly a sleep-onset problem. Answers of [2, 1, 1, 2, 1, 0, 1] produce a total of 8. That falls in the Subthreshold band. The night subtotal is 4, the day subtotal is 2, and the strongest night-time item is difficulty falling asleep. The overall burden is present but not broad.
Example 2: wider recent strain. Answers of [3, 3, 2, 3, 3, 2, 4] produce a total of 20. That falls in the Clinical Moderate band. Night-time and daytime burdens are both elevated, distress is high, and the profile is not telling a one-item story anymore. That is the kind of result where the guidance panel becomes more important than the gauge alone.
Example 3: low night-time symptom burden with daytime concern. If the first three items all stay at 0 or 1 but the later impact and worry items climb, the page labels the pattern as low night-time symptom burden rather than forcing a night symptom label. That is useful when the complaint feels bigger in the day than it does during the night itself.
No. It is a structured self-report assessment that scores recent insomnia burden. Diagnosis depends on the broader clinical picture.
No. The official ISI centers on the 0 to 28 total. This bundle adds night and day derived views to make the result easier to read.
The page waits for all seven responses before it computes the total, the band, the gauge, and the guidance text.
The scoring logic in this bundle runs in the browser and does not post answers to a helper endpoint. The privacy caveat is the URL state, which stores an encoded response string in r.
Read the result in context. If sleep problems are persistent, disruptive, or affecting safety, work, mood, or daily function, follow up with a qualified health-care professional. Structured treatments such as CBT-I are commonly recommended for chronic insomnia.