NPI Total Calculator
NPI12domain frequency×severity aggregation, maximum144; domains independently assessed, absent0paired with0, presentfrequency1–4/severity1–3. Unknown bounds retained; no caregiver-distress inclusion, NPI-Qsubstitution or diagnosis.
Description
The NPI combines independently coded domain frequency and severity findings.
The NPI combines independently coded domain frequency and severity findings.1
A known-domain total remains distinct from unresolved domain evidence.
When to use NPI Total Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Establish the assessment or recording protocol, units, instrument version and independently applicable reference or calibration.
How to use NPI Total Calculator and understand its results
- Establish the assessment or recording protocol, units, instrument version and independently applicable reference or calibration.
- Enter independentlyCodedDomainFrequencies, independentlyCodedDomainSeverities, domainKnownFlags, using the field meanings and rules below, then run the tool.
- Read result.knownNpiTotal, result.minimumPossibleTotal, result.maximumPossibleTotal, result.unknownDomainIndices. Use the units and sign conventions below. Review unresolved records and any possible bounds separately from known results.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| independentlyCodedDomainFrequencies | Independently coded domain frequencies | list of number | Required |
| independentlyCodedDomainSeverities | Independently coded domain severities | list of number | Required |
| domainKnownFlags | Domain known flags; binary 1 means the matched observation is known, 0 means unknown | list of number | Required |
Require exactly 12 aligned frequency/severity domain codes and binary known flags. Frequency is integer 0–4 and severity integer 0–3. Both codes must be zero for an absent domain and both positive for a present domain, including unknown placeholders. Sum frequency×severity for known domains; add 12 for each unknown to the maximum, retaining zero-based unknown domain indices.
knownNPI=Σ(frequency_i×severity_i×known_i); possibleMin=knownNPI; possibleMax=knownNPI+12×unknownCount Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Structured result; its nested fields below contain the actual calculation or selected reference | object |
| result.knownNpiTotal | Sum of frequency times severity over known NPI domains | number |
| result.minimumPossibleTotal | Known contribution plus every unknown component's permitted minimum | number |
| result.maximumPossibleTotal | Known contribution plus every unknown component's permitted maximum | number |
| result.unknownDomainIndices | Unknown Domain Indices; zero-based positions in the corresponding input record; unresolved records kept separate from known results | list |
{
"input": {
"independentlyCodedDomainFrequencies": [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
],
"independentlyCodedDomainSeverities": [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
],
"domainKnownFlags": [
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
]
},
"output": {
"result": {
"knownNpiTotal": 12,
"minimumPossibleTotal": 12,
"maximumPossibleTotal": 12,
"unknownDomainIndices": []
}
}
}Limitations and assumptions
Actual acquisition, assessment protocol, instrument version and calibration determine applicability. The tool does not examine a person, classify images, administer a questionnaire or choose diagnostic cutoffs.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Lists and matrices must be dense, without missing cells. Numeric lists allow at most 10000 entries; ordinary string lists allow at most 128 strings of 128 UTF-16 units each; numeric matrices allow at most 128 rows and 128 columns, subject to narrower requirements above. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Clinical Dementia Rating Calculator: Clinical Dementia Rating depends on its adopted assessment protocol and domain evidence. For a complementary comparison, use CERAD Neuropathology Score Calculator: CERAD neuropathology scoring belongs to a declared pathological assessment framework.
References
-
NPI Total Calculator — tool.io
Similar or alternative tools
- Clinical Dementia Rating Calculator
Clinical Dementia Rating depends on its adopted assessment protocol and domain evidence.
- CERAD Neuropathology Score Calculator
CERAD neuropathology scoring belongs to a declared pathological assessment framework.