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. 2021 Dec 14;42(2):272–278. doi: 10.19852/j.cnki.jtcm.2022.02.010

Table 2.

Characteristics of Study participants with different age group [n (%)]

Item Total (n = 2109) Age (years) P value
≤ 25
(n = 409)
25-30
(n = 1379)
30-35
(n = 289)
35-45
(n = b32)
Education < 0.001
High school or less 300 (14.22) 129 (31.54) 132 (9.57) 31 (10.73) 8 (25.00)
Bachelor 1514 (71.79) 257 (62.84) 1027 (74.47) 210 (72.66) 20 (62.50)
Master/doctor 278 (13.18) 15 (3.67) 213 (15.45) 46 (15.92) 4 (12.50)
Missing 17 (0.81) 8 (1.96) 7 (0.51) 2 (0.69) 0 (0.00)
Age at menarche 13.22 (1.36) 13.3 (1.47) 13.21 (1.33) 13.14 (1.32) 13.48 (1.7) 0.326
Abortion history < 0.001
0 1540 (73.02) 304 (74.33) 1041 (75.49) 176 (60.90) 19 (59.38)
1-2 457 (21.67) 87 (21.27) 270 (19.58) 90 (31.14) 10 (31.25)
≥3 19 (0.90) 0 (0.00) 11 (0.80) 8 (2.77) 0 (0.00)
Missing 93 (4.41) 18 (4.40) 57 (4.13) 15 (5.19) 3 (9.38)
Menstrual Cycle Length 0.47
Regular 516 (24.47) 97 (23.72) 342 (24.80) 69 (23.88) 8 (25.00)
Short 318 (15.08) 65 (15.89) 206 (14.94) 44 (15.22) 3 (0.38)
Long 700 (33.19) 142 (34.72) 459 (33.28) 93 (32.18) 6 (18.75)
Irregular 575 (27.26) 105 (25.67) 372 (26.98) 83 (28.72) 15 (46.88)
Menstrual Blood Color 0.35
Dark Red 735 (34.85) 134 (32.76) 491 (35.61) 99 (34.26) 11 (34.38)
Bright Red 1144 (54.24) 224 (54.77) 738 (53.52) 167 (57.79) 15 (46.88)
Light Red 75 (3.56) 19 (4.65) 44 (3.19) 9 (3.11) 3 (9.38)
Unknown 155 (7.35) 32 (7.82) 106 (7.69) 14 (4.84) 3 (9.38)
Blood Clots 0.86
Yes 1135 (53.82) 227 (55.50) 738 (53.52) 154 (53.29) 16 (50.00)
No 974 (46.18) 182 (44.50) 641 (46.48) 135 (46.71) 16 (50.00)
Fertility outcome 0.01
Fail to conception 715 (33.90) 116 (28.36) 494 (35.82) 90 (31.14) 15 (46.88)
Achieve conception 1394 (66.10) 293 (71.64) 885(64.18) 199(68.86) 17 (53.13)
include:
Ongoing Pregnancy 187 (13.41) 17 (5.80) 125 (14.12) 38 (19.10) 7 (41.18)
Given birth 1207 (86.59) 276 (94.20) 760 (85.88) 161 (80.90) 10 (58.82)
Pregnancy outcome 0.05
Live Birth 1119 (92.71) 265 (96.01) 699 (91.97) 147 (91.30) 8 (80.00)
Miscarriage 88 (7.29) 11 (3.99) 61 (8.03) 14 (8.70) 2 (20.00)