Table 1 The relationships between demographic data of the subjects and the course of pregnancy
Variables | n | Threatened premature birth n = 43 (%) | Non-threatened premature birth n = 108 (%) | p value* |
|---|---|---|---|---|
Age (years) | ||||
≤24 | 22 | 7 (31.8) | 15 (68.2) | 0.929 |
≥25, ≤34 | 108 | 30 (27.8) | 78 (72.2) | |
≥35 | 21 | 6 (28.6) | 15 (71.4) | |
Childbirth history | ||||
Primiparas | 67 | 25 (37.3) | 42 (62.7) | 0.032 |
Multiparas | 84 | 18 (21.4) | 66 (78.6) | |
Smoking habits | ||||
Currently smoking | 13 | 3 (23.1) | 10 (76.9) | 0.879 |
Currently not smoking, but with a previous history of smoking | 53 | 16 (30.2) | 37 (69.8) | |
No history of smoking | 84 | 24 (28.6) | 60 (71.4) | |
History of miscarriage, premature birth, or threatened premature birth in previous pregnancies | ||||
No | 126 | 37 (29.4) | 89 (70.6) | 0.587 |
Yes | 25 | 6 (24.0) | 19 (76.0) | |