Table 2. Comparison of modalities for identifying falls in nursing records.

Method	True positive, n	False positive, n	True negative, n	False negative, n	Sensitivity (95% CI)	Specificity (95% CI)	PPV (95% CI)	NPV (95% CI)
AI algorithm	99	505	29 987	25	0.80 (0.72 to 0.87)	0.98 (0.98 to 0.98)	0.16 (0.14 to 0.20)	1.00 (1.00 to 1.00)
Incident reports	46	1	30 491	78	0.37 (0.29 to 0.46)	1.00 (1.00 to 1.00)	0.98 (0.89 to 1.00)	1.00 (1.00 to 1.00)

NPV, negative predictive value; PPV, positive predictive value.