Table 3.

Sensitivity and specificity of the MEWS as a predictor of admission to a critical care unit and comparison with the test results apparent on chart review

	Sensitivity	Specificity	PPV	NPV
Abnormal WCC	14/16 (88%)	202/334 (60%)	14/130 (11%)	202/204 (99%)
CRP > 100 mg/l	11/16 (69%)	200/334 (60%)	11/103 (11%)	200/231 (87%)
Documented SIRS	10/16 (63%)	287/334 (86%)	10/45 (22%)	287/289 (99%)
MEWS 3 or more	14/16 (88%)	228/334 (68%)	14/103 (14%)	228/231 (99%)
MEWS 4 or more	12/16 (75%)	276/334 (83%)	12/55 (22%)	276/279 (99%)
MEWS 5 or more	6/16 (38%)	298/334 (89%)	6/27 (22%)	298/307 (96%)
MEWS 6 or more	3/16 (19%)	311/334 (93%)	3/9 (33%)	311/325 (96%)
MEWS 7 or more	1/16 (6%)	314/334 (94%)	1/2 (50%)	314/332 (95%)