Table 1

Summary test characteristics of each of the 3 measures analysed
TEST 1: Falling hCG between days 0-4
Treatment Success Treatment Failure Total
Falling hCG 94 16 110 PPV: 85% (95% CI 79-92%)
Rising hCG 52 44 96 NPV: 46%
Total 146 60 206
Sensitivity: Specificity:
64% 73%
TEST 2: ≥15% Fall in hCG between days 4-7
Treatment Success Treatment Failure Total
Falling hCG 121 15 136 PPV: 89% (95% CI 84-94%)
Rising hCG 25 45 70 NPV: 64%
Total 146 60 206
Sensitivity: Specificity:
83% 75%
TEST 3: <20% Fall in hCG between days 0-4
Treatment Success Treatment Failure Total
Falling hCG 59 4 63 PPV: 94% (95% CI 88-100%)
Rising hCG 87 56 143 NPV: 39%
Total 146 60 206
Sensitivity: Specificity:
40% 93%

Skubisz et al.

Skubisz et al. BMC Pregnancy and Childbirth 2013 13:30   doi:10.1186/1471-2393-13-30

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