Demographic characteristics |
|
|
|
|
Age |
32.8±4.2 |
0.014 |
32.4±42 |
0.657 |
BMI before pregnancy |
|
|
|
|
Normal(18.5-23.9 kg/m2) |
87(27.6) |
|
41(13.3) |
|
overweight(24.0-27.9 kg/m2) |
43(47.3) |
0.000 |
19(22.4) |
0.040 |
obesity(≥28.0 kg/m2) |
20(50.0) |
0.001 |
11(28.9) |
0.018 |
Obstetric data |
|
|
|
|
Pregnancy frequency |
|
|
|
|
0 to 2 times |
126(29.8) |
|
63(15.3) |
|
≥3 times |
61(47.3) |
0.000 |
28(22.6) |
0.060 |
Pregnancy interval (year) |
4.2±3.4 |
0.685 |
4.4±36 |
0.540 |
Multiparous |
|
|
|
|
no |
132(32.6) |
|
62(15.7) |
|
yes |
55(36.7) |
0.367 |
29(20.1) |
0.228 |
Twin pregnancy |
|
|
|
|
no |
110(24.9) |
|
57(13.3) |
|
yes |
77(67.5) |
0.000 |
34(30.9) |
0.000 |
Mode of fertilization |
|
|
|
|
nature |
116(26.4) |
|
57(13.3) |
|
IVF-ET |
70(60.9) |
0.000 |
34(31.2) |
0.000 |
Gestational age of 1st short cervix (week) |
26.2±5.5 |
0.000 |
24.9±5.9 |
0.000 |
CL of 1st short cervix (mm) |
18.8±5.1 |
0.000 |
17.9±6.1 |
0.000 |
Amniotic fluid sludge |
|
|
|
|
no |
117(32.8) |
|
83(15.9) |
|
yes |
10(66.7) |
0.006 |
8(53.3) |
0.001* |
Gestational age of delivery (week) |
32.3±4.3 |
|
29.3±4.5 |
|
Risky history |
|
|
|
|
Induced abortion |
|
|
|
|
0 |
132(32.8) |
|
70(17.9) |
|
≥1 time |
55(36.2) |
0.446 |
21(14.3) |
0.319 |
Later-period spontaneous abortion |
|
|
|
|
0 |
180(33.5) |
|
86(16.5) |
|
≥1 time |
7(38.9) |
0.635 |
5(29.4) |
0.184* |
Intrauterine operation frequency(except abortion) |
|
|
|
|
0 |
153(32.5) |
|
76(16.6) |
|
≥1 time |
34(40.5) |
0.153 |
15(18.5) |
0.676 |
History of forceps midwifery |
|
|
|
|
no |
187(33.9) |
|
91(17.0) |
|
yes |
0(0) |
0.554* |
0 |
1.000* |
History of cesarean delivery |
|
|
|
|
no |
36(33.1) |
|
79(16.3) |
|
yes |
21(38.9) |
0.395 |
12(23.1) |
0.212 |
History of PTB |
|
|
|
|
no |
175(32.5) |
|
84(16.1) |
|
yes |
12(70.6) |
0.001 |
7(41.2) |
0.014* |
History of short cervix |
|
|
|
|
no |
181(33.3) |
|
85(16.1) |
|
yes |
6(54.5) |
0.195* |
6(54.5) |
0.005* |
History of PPROM |
|
|
|
|
no |
183(33.5) |
|
89(16.8) |
|
yes |
4(50.0) |
0.452* |
2(25.0) |
0.539 |
History of LEEP |
|
|
|
|
no |
176(33.5) |
|
86(16.9) |
|
yes |
11(37.9) |
0.620 |
5(17.9) |
0.800* |
Preexisting comorbidities |
|
|
|
|
Autoimmune disease |
|
|
|
|
no |
177(32.7) |
|
86(16.4) |
|
yes |
10(71.4) |
0.007* |
5(35.7) |
0.070* |
PCOS |
|
|
|
|
no |
179(33.0) |
|
86(16.3) |
|
yes |
8(61.5) |
0.040* |
5(41.7) |
0.037* |
hypothyroidism |
|
|
|
|
no |
172(34.1) |
|
83(17.0) |
|
yes |
15(30.0) |
0.562 |
8(16.3) |
0.908 |
Pregestational diabetes mellitus |
|
|
|
|
no |
180(33.2) |
|
88(16.8) |
|
yes |
7(53.8) |
0.141* |
3(23.1) |
0.469* |
Pregestational hypertension |
|
|
|
|
no |
178(33.5) |
|
83(16.1) |
|
yes |
9(39.1) |
0.573 |
8(36.4) |
0.020* |
Polyhydramnios# |
|
|
|
|
no |
178(33.3) |
|
86(16.6) |
|
yes |
9(42.9) |
0.365 |
5(23.8) |
0.376* |
Gestational diabetes mellitus# |
|
|
|
|
no |
123(34.9) |
|
62(18.1) |
|
yes |
64(31.5) |
0.412 |
29(14.9) |
0.341 |
Blood pressure state# |
|
|
|
|
normal |
156(32.0) |
|
79(16.7) |
|
Gestational hypertension |
4(18.2) |
0.765* |
1(4.8) |
0.230* |
Preeclampsia without serious manifestation |
4(33.3) |
1.000* |
0 |
0.230* |
Preeclampsia with serious manifestation |
15(68.2) |
0.000 |
7(33.3) |
0.082* |
Chronic hypertension complicating pregnancy |
8(66.7) |
0.047 |
4(33.3) |
0.132* |