Diagnostic Test 2×2 (sens / spec / PV / LR)
Diagnostic Test 2×2 (sens / spec / PV / LR) - a deterministic tool in Sophie Well's Clinical Math & Conversions group.
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What this is
Diagnostic Test 2×2 (sens / spec / PV / LR) is one of 230 deterministic tools in Sophie Well's Clinical Math & Conversions group. Diagnostic Test 2×2 (sens / spec / PV / LR) - a deterministic tool in Sophie Well's Clinical Math & Conversions group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
Altman DG, Bland JM. Diagnostic tests 1: sensitivity and specificity. BMJ. 1994;308(6943):1552; Diagnostic tests 2: predictive values. BMJ. 1994;309(6947):102. Read the source ↗
Worked example: Sensitivity 90%, specificity 90%; LR+ 9; at 5% prevalence PPV 32.1%.
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