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. 2019 Aug 27;19:313. doi: 10.1186/s12884-019-2466-5

Table 2.

Comparisons among the three groups regarding baseline characteristics

Variable Group A
(n = 38)
Group B
(n = 48)
Group C
(n = 16)
P. V. (Sig.)
Age, mean ± SD (range) 32.9 ± 4.1 31.8 ± 4.2 31.7 ± 4.5 0.429NS
Parity 1–2 2 (5.3%) 26 (54.2%) 14 (87.5%) < 0.001**
3–4 22 (57.9%) 22 (45.8%) 2 (12.5%)
≥ 5 14 (36.8%) 0 0
Previous CS 1 0 10 (20.8%) 8 (50%) < 0.001**
2 4 (10.5%) 18 (37.5%) 8 (50%)
3 18 (47.4%) 18 (37.5%) 0
4 16 (42.1%) 2 (4.2%) 0
History of placenta previa Yes 13 (34.2%) 15 (31.2%) 6 (37.5%) 0.035*
No 25 (65.8%) 33 (68.8%) 10 (62.5%)

NS Not significant, * = Significant (p < 0.05),** = highly significant (p < 0.01), SD standard deviation, CS cesarean section