Table 4.

Agreement between the posttraumatic stress disorder case definitions in the Canadian Primary Care Sentinel Surveillance Network and the reference data set (N=12,104).

Case definitions	TPa (n)	TNb (n)	FNc (n)	FPd (n)	SEe (%, CI)	SPf (%, CI)	PPVg (%, CI)	NPVh (%, CI)	Accuracy (%, CI)
1	2917	8000	1116	71	72.3 (70.9-73.7)	99.1 (98.9-99.3)	97.6 (97.0-98.1)	87.8 (87.2-88.3)	90.2 (89.7-90.7)
2	2502	8045	1531	26	62.0 (60.5-63.5)	99.7 (99.5-99.8)	99.0 (98.5-99.3)	84.0 (83.5-84.5)	87.1 (86.5-87.7)
3	2917	8004	1116	67	72.3 (70.9-73.7)	99.2 (99.0-99.4)	97.8 (97.2-98.2)	87.8 (87.2-88.3)	90.2 (89.7-90.8)
4	3672	8000	361	71	91.1 (90.1-91.9)	99.1 (98.9-99.3)	98.1 (97.6-98.5)	95.7 (95.3-96.1)	96.4 (96.1-96.8)

^aTP: true positive.

^bTN: true negative.

^cFN: false negative.

^dFP: false positive.

^eSE: sensitivity.

^fSP: specificity.

^gPPV: positive predictive value.

^hNPV: negative predictive value.