Table 3.

Performance of two-item Tipping Point Index (both items endorsed) for prediction of significant anxiety or depression

Item	Entire sample (95% CI)	Random subsamples	Men n=73	Women n=960	White n=952	Black and minority ethnic n=84	Hospital n=554	Nursing or care home n=157	Other community setting n=307
Sensitivity	0.64 (0.58 to 0.69)	0.60, 0.68	0.69	0.64	0.63	0.72	0.63	0.60	0.67
Specificity	0.90 (0.87 to 0.92)	0.88, 0.91	0.93	0.89	0.89	0.97	0.92	0.90	0.83
Positive predictive power	0.72 (0.67 to 0.77)	0.68, 0.77	0.73	0.72	0.71	0.90	0.76	0.69	0.62
Negative predictive power	0.86 (0.84 to 0.87)	0.84, 0.87	0.91	0.85	0.85	0.89	0.86	0.85	0.86