Table 1.
Baseline characteristics of study participants
| Characteristic | U. parvum serovar 1 | U. parvum serovar 3 | U. parvum serovar 6 | U. parvum serovar 14 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Negative (n = 4854) |
Positive (n = 423) |
P |
Negative (n = 4333) |
Positive (n = 944) |
P |
Negative (n = 4432) |
Positive (n = 845) |
P |
Negative (n = 5190) |
Positive (n = 87) |
P | |
| Age, year | 35.96 ± 7.32 | 36.67 ± 7.40 | 0.057 | 36.00 ± 7.31 | 36.13 ± 7.40 | 0.618 | 35.95 ± 7.33 | 36.39 ± 7.27 | 0.106 | 36.03 ± 7.33 | 35.26 ± 6.81 | 0.332 |
| BMI, kg/m2 | 22.16 ± 3.14 | 22.33 ± 3.15 | 0.293 | 22.17 ± 3.13 | 22.19 ± 3.19 | 0.861 | 22.19 ± 3.13 | 22.08 ± 3.18 | 0.401 | 22.16 ± 3.14 | 22.83 ± 3.27 | 0.087 |
| Ethnicity | 0.220 | 0.899 | 0.075 | 0.248 | ||||||||
| Han | 4110 (94.24%) | 356 (92.71%) | 3679 (94.14%) | 787 (94.03%) | 3765 (94.38%) | 701 (92.72%) | 4407 (94.17%) | 59 (90.77%) | ||||
| Ethnic minorities | 251 (5.76%) | 28 (7.29%) | 229 (5.86%) | 50 (5.97%) | 224 (5.62%) | 55 (7.28%) | 273 (5.83%) | 6 (9.23%) | ||||
| Education level | 0.062 | 0.347 | 0.072 | 0.033 | ||||||||
| Below undergraduate | 2392 (64.70%) | 229 (69.82%) | 2159 (64.80%) | 462 (66.67%) | 2185 (64.53%) | 436 (68.23%) | 2577 (64.93%) | 44 (78.57%) | ||||
| Undergraduate and above | 1305 (35.30%) | 99 (30.18%) | 1173 (35.20%) | 231 (33.33%) | 1201 (35.47%) | 203 (31.77%) | 1392 (35.07%) | 12 (21.43%) | ||||
| Contraceptive methods | 0.002 | 0.192 | 0.009 | 0.236 | ||||||||
| Noncontraception | 692 (18.21%) | 74 (22.63%) | 618 (18.20%) | 148 (20.19%) | 624 (17.86%) | 142 (22.40%) | 758 (18.64%) | 8 (12.90%) | ||||
| Intrauterine device | 444 (11.68%) | 48 (14.68%) | 402 (11.84%) | 90 (12.28%) | 407 (11.65%) | 85 (13.41%) | 480 (11.81%) | 12 (19.35%) | ||||
| Contraceptives | 92 (2.42%) | 15 (4.59%) | 82 (2.42%) | 25 (3.41%) | 88 (2.52%) | 19 (3.00%) | 106 (2.61%) | 1 (1.61%) | ||||
| Condom | 2573 (67.69%) | 190 (58.10%) | 2293 (67.54%) | 470 (64.12%) | 2375 (67.97%) | 388 (61.20%) | 2722 (66.95%) | 41 (66.13%) | ||||
| Number of sexual partners | 0.590 | 0.113 | 0.865 | 0.125 | ||||||||
| 1 | 4343 (96.60%) | 367 (96.07%) | 3895 (96.75%) | 815 (95.66%) | 3958 (96.54%) | 752 (96.66%) | 4645 (96.51%) | 65 (100.00%) | ||||
| ≥ 2 | 153 (3.40%) | 15 (3.93%) | 131 (3.25%) | 37 (4.34%) | 142 (3.46%) | 26 (3.34%) | 168 (3.49%) | 0 (0.00%) | ||||
| Gravidity | 0.635 | 0.033 | 0.275 | 0.504 | ||||||||
| 0 | 609 (13.63%) | 49 (12.86%) | 518 (12.96%) | 140 (16.43%) | 554 (13.62%) | 104 (13.32%) | 652 (13.64%) | 6 (8.82%) | ||||
| 1 | 1015 (22.72%) | 85 (22.31%) | 920 (23.02%) | 180 (21.13%) | 929 (22.84%) | 171 (21.90%) | 1085 (22.70%) | 15 (22.06%) | ||||
| 2 | 1158 (25.92%) | 91 (23.88%) | 1045 (26.15%) | 204 (23.94%) | 1063 (26.14%) | 186 (23.82%) | 1227 (25.67%) | 22 (32.35%) | ||||
| ≥ 3 | 1685 (37.72%) | 156 (40.94%) | 1513 (37.86%) | 328 (38.50%) | 1521 (37.40%) | 320 (40.97%) | 1816 (37.99%) | 25 (36.76%) | ||||
| Parity | 0.621 | 0.015 | 0.230 | 0.130 | ||||||||
| 0 | 784 (17.76%) | 69 (18.16%) | 674 (17.06%) | 179 (21.18%) | 701 (17.41%) | 152 (19.79%) | 847 (17.90%) | 6 (9.38%) | ||||
| 1 | 1974 (44.71%) | 157 (41.32%) | 1759 (44.53%) | 372 (44.02%) | 1784 (44.30%) | 347 (45.18%) | 2096 (44.30%) | 35 (54.69%) | ||||
| 2 | 1441 (32.64%) | 134 (35.26%) | 1313 (33.24%) | 262 (31.01%) | 1344 (33.37%) | 231 (30.08%) | 1553 (32.83%) | 22 (34.38%) | ||||
| ≥ 3 | 216 (4.89%) | 20 (5.26%) | 204 (5.16%) | 32 (3.79%) | 198 (4.92%) | 38 (4.95%) | 235 (4.97%) | 1 (1.56%) | ||||
Abbreviations: U. parvum Ureaplasma parvum, BMI body mass index
Means ± SDs for continuous variables, n (%) for categorical variables
Statistics with a P-value of 0.05 or less are shown in bold text