Table 13

Receiver operating characteristic curve analysis of factors predicting one-year poor functional outcome among 303 patients

Copeptin

WFNS score

Modified Fisher score

Criterion

>23.8 pmol/L

>2

>2

Area under curve

0.860

0.909

0.902

95% confidence interval

0.815~0.897

0.871~0.939

0.863~0.933

Sensitivity

82.2

96.7

95.6

95% confidence interval

72.7~89.5

90.6~99.3

89.0 ~98.7

Specificity

79.8

74.7

69.5

95% confidence interval

73.8~85.0

68.3 ~80.3

62.8~75.6

Odds ratio

18.284

85.228

48.941

95% confidence interval

9.684~34.522

25.912~280.325

17.237~139.015

+ likelihood ratio

4.07

3.81

3.13

95% confidence interval

3.6~4.6

3.5~4.2

2.8 ~3.5

- likelihood ratio

0.22

0.045

0.064

95% confidence interval

0.1~0.4

0.01 ~0.1

0.02 ~0.2

P value

Reference

0.109

0.178

WFNS indicates World Federation of Neurological Surgeons.

Zhu et al. Critical Care 2011 15:R288   doi:10.1186/cc10575