Identifying Primary Spontaneous Pneumothorax from Administrative Databases: A Validation Study

Table 3

Diagnostic performance of the administrative data algorithm for the identification of primary spontaneous pneumothorax cases (estimate and 95% confidence interval).

Measure	Total	0 to 39 years	40 years and over
Sensitivity	94 (88–98)	97 (91–99)	81 (54–96)	0.0376
Specificity	57 (43–69)	48 (26–70)	62 (45–77)	0.4135
Positive predictive value	77 (68–84)	87 (78–93)	46 (28–66)	<0.0001
Negative predictive value	87 (73–96)	83 (52–98)	89 (71–98)	0.6342