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Table 4 The gross rate of pregnancy between the two groups

From: Efficacy of a combined contraceptive regimen consisting of condoms and emergency contraception pills

Intervention group Control group
Month No. Sub. Of not use condom No. Preg. Cumulative condom use rate Cumulative of pregnancy gross rate SE of Cumulative pregnancy gross rate No. Sub. Of not use condom No. Preg. Cumulative condom use rate Cumulative of pregnancy gross rate SE of Cumulative pregnancy gross rate
X Wx Ex P(x) Qe(x+1) Sqe(x+1) Wx Ex P(x) Qe(x+1) Sqe(x+1)
0 0 4 0.99505 0.00495 0.002469 0 0 1.00000 0.00000 0.000000
1 0 1 0.99381 0.00619 0.002764 1 1 0.99864 0.00136 0.001358
2 0 2 0.99128 0.00872 0.003283 0 1 0.99727 0.00273 0.001926
3 0 1 0.99000 0.01000 0.003519 0 0 0.99727 0.00273 0.001926
4 0 1 0.98872 0.01128 0.003742 0 2 0.99451 0.00549 0.002738
5 0 2 0.98614 0.01386 0.004153 0 1 0.99313 0.00687 0.003065
6 0 1 0.98484 0.01516 0.004344 0 0 0.99313 0.00687 0.003065
7 0 1 0.98354 0.01646 0.004528 0 1 0.99173 0.00827 0.003365
8 0 0 0.98354 0.01646 0.004528 0 1 0.99033 0.00967 0.003640
9 0 3 0.97963 0.02037 0.005042 0 0 0.99033 0.00967 0.003640
10 0 1 0.97833 0.02167 0.005201 0 0 0.99033 0.00967 0.003640
11 0 0 0.97833 0.02167 0.005201 0 2 0.98752 0.01248 0.004138
12 0 0 0.97833 0.02167 0.005201 0 0 0.98752 0.01248 0.004138
Total 0 17 — — — — — — 1 9 — — — — — —
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