Table 1 Demographic and socioeconomic characteristics of women in the two groups (number (%))
Characteristic | NCMS (n = 747) | Non-NCMS (n = 866) | Total | p-value |
|---|---|---|---|---|
Age(years) | Â | Â | Â | Â |
   < 20 | 2(0.3) | 8(0.9) | 10(0.6) | < 0.001 |
   20-24 | 364(48.7) | 282(32.6) | 646 (40.0) |  |
   25-29 | 241(32.3) | 323(37.3) | 564(35.0) |  |
   30-34 | 115(15.4) | 167(19.3) | 282 (17.5) |  |
   35+ | 25(3.3) | 86(9.9) | 111(6.9) |  |
Parity | Â | Â | Â | Â |
   Primiparous | 535 (71.6) | 403(46.5) | 938 (58.2) | < 0.001 |
   Multiparous | 212 (28.4) | 463(53.5) | 675 (41.8) |  |
Education | Â | Â | Â | Â |
   Illiteracy | 26(3.5) | 35(4.0) | 61 (3.8) | 0.255 |
   Primary school | 129(17.3) | 138(15.9) | 267 (16.6) |  |
   Junior high school | 492(66.0) | 558(64.4) | 1050 (65.1) |  |
   Senior high school or above | 99 (13.3) | 135 (15.6) | 234(14.6) |  |
Household income(RMB, yuan) | Â | Â | Â | Â |
   ≤ 7000 | 83(11.9) | 109(13.7) | 192(12.9) | 0.005 |
   7001-10000 | 198(28.4) | 257(32.4) | 455(30.5) |  |
   10001-20000 | 291(41.8) | 309(39.0) | 600(40.3) |  |
   20001+ | 125(17.9) | 118(14.9) | 243(16.3) |  |