Table 2

Table of weekly miscarriage rate, cumulative probabilities of survival and of miscarriage and remaining risk of miscarriage at each gestation week

Gestational week	Pregnancies detected during week	Pregnancy-weeks at risk	Miscarriage	Induced abortion	Loss to follow-up and withdrawals	Weekly miscarriage rate per 1000 pregnancy-weeks (95% CI)	Probability of miscarriage per gestational week	Probability of survival per gestational week	Cumulative probability of survival	Cumulative probability of miscarriage	Remaining probability of miscarriage
<4	48	32.3	0	1	1	0	0.000	1.000	1.000	0.000	0.189
4	42	67.4	2	0	0	29.66 (7.42 to 120)	0.029	0.971	0.971	0.029	0.189
5	77	127.6	2	0	0	15.68 (3.92 to 62.69)	0.016	0.984	0.956	0.044	0.165
6	79	200.1	5	0	0	24.98 (10.4 to 60.02)	0.025	0.975	0.932	0.068	0.152
7	69	276.9	2	3	0	7.22 (1.81 to 28.88)	0.007	0.993	0.925	0.075	0.130
8	71	334.1	3	1	1	8.98 (2.9 to 27.84)	0.009	0.991	0.917	0.083	0.124
9	63	397.7	6	0	0	15.09 (6.78 to 33.58)	0.015	0.985	0.903	0.097	0.116
10	59	451	7	0	0	15.52 (7.4 to 32.56)	0.015	0.985	0.889	0.111	0.103
11	57	502.6	6	1	1	11.94 (5.36 to 26.57)	0.012	0.988	0.879	0.121	0.088
12	52	548.3	12	1	1	21.89 (12.43 to 38.54)	0.022	0.978	0.860	0.140	0.078
13	41	583.4	3	1	0	5.14 (1.66 to 15.94)	0.005	0.995	0.855	0.145	0.057
14	52	626.6	4	0	1	6.38 (2.4 to 17.01)	0.006	0.994	0.850	0.150	0.052
15	40	667.9	9	0	0	13.47 (7.01 to 25.9)	0.013	0.987	0.839	0.161	0.046
16	43	703.1	2	0	0	2.84 (0.71 to 11.37)	0.003	0.997	0.836	0.164	0.033
17	44	739.9	5	1	0	6.76 (2.81 to 16.24)	0.007	0.993	0.831	0.169	0.030
18	30	769.1	5	0	0	6.5 (2.71 to 15.62)	0.006	0.994	0.825	0.175	0.024
19	33	796.4	2	0	0	2.51 (0.63 to 10.04)	0.003	0.997	0.823	0.177	0.018
20	26	823.9	4	0	1	4.86 (1.82 to 12.94)	0.005	0.995	0.819	0.181	0.015
21	33	852.1	1	0	1	1.17 (0.17 to 8.33)	0.001	0.999	0.818	0.182	0.010
22	23	873.4	0	0	1	0	0.000	1.000	0.818	0.182	0.009
23	36	905.6	1	0	0	1.1 (0.16 to 7.84)	0.001	0.999	0.817	0.183	0.009
24	30	937.3	0	0	0	0	0.000	1.000	0.817	0.183	0.008
25	20	960.1	2	0	0	2.08 (0.52 to 8.33)	0.002	0.998	0.816	0.184	0.008
26	38	994.4	4	0	0	4.02 (1.51 to 10.72)	0.004	0.996	0.812	0.188	0.006
27	28	1016.9	2	0	12	1.97 (0.49 to 7.86)	0.002	0.998	0.811	0.189	0.002