Table 1 Characteristics of the pregnant women in the 3rd trimester according to exposure to SHS n(%)/median (IQR)
Characteristic | Total n = 678 | Never exposed to SHS n = 440 | Current exposure to SHS n = 238 | Z/χ2 | p Value |
|---|---|---|---|---|---|
Demographic characteristic of the participants | |||||
 Age | 29.0 (6.0) | 29.0 (6.0) | 29.0 (6.0) | −0.748 | 0.455 |
Ethnicity | |||||
 Han | 663 (97.8) | 427 (64.4) | 236 (35.6) | 3.191 | 0.074 |
 Minority group | 15 (2.2) | 13 (86.7) | 2 (13.3) |  |  |
Household registration status (hukou) | |||||
 Rural area | 182 (26.8) | 115 (63.2) | 67 (36.8) | 0.319 | 0.572 |
 Urban area | 496 (73.2) | 325 (65.5) | 171 (34.5) |  |  |
Living with an aunt/uncle after getting married | |||||
 No | 244 (36.0) | 177 (39.4) | 67 (27.5) | 9.777 | 0.002 |
 Yes | 434 (64.0) | 263 (60.6) | 171 (39.4) |  |  |
Regular antenatal examinations | |||||
 Yes | 621 (91.6) | 392 (63.1) | 229 (36.9) | 10.190 | 0.001 |
 No | 57 (8.4) | 48 (84.2) | 9 (15.9) |  |  |
Complications of pregnancy | |||||
 No | 607 (89.5) | 391 (64.4) | 216 (35.6) | 0.590 | 0.442 |
 Yes | 71 (10.5) | 49 (69.0) | 22 (31.0) |  |  |
Individual SES | |||||
 Marital Status | |||||
  Married and living together | 647 (95.4) | 417 (64.5) | 230 (35.5) | 1.232 | 0.267 |
  Divorced but living together/Cohabiting relationship | 31 (4.6) | 23 (74.2) | 8 (25.8) |  |  |
 Employment status | |||||
  Yes | 508 (74.9) | 346 (68.1) | 162 (31.9) | 9.184 | 0.002 |
  No | 170 (25.1) | 94 (55.3) | 76 (44.7) |  |  |
 Educational attainment | |||||
  Junior middle school or below | 132 (19.5) | 82 (62.1) | 50 (37.9) | 4.091 | 0.129 |
  High school or technical secondary school | 161 (23.7) | 96 (59.6) | 65 (40.4) |  |  |
  College or above | 385 (56.8) | 262 (68.1) | 123 (31.9) |  |  |
 Per capita monthly income in RMB | |||||
   ≤ 3000 | 60 (8.8) | 40 (66.7) | 20 (33.3) | 0.260 | 0.878 |
  3001–7999 | 482 (71.1) | 314 (65.1) | 168 (34.9) |  |  |
   ≥ 8000 | 136 (20.1) | 86 (63.2) | 50 (36.8) |  |  |
Behavioral lifestyle habits | |||||
 Smoking habit | |||||
  Never | 649 (95.7) | 419 (64.6) | 230 (35.4) | 0.751 | 0.386 |
  Former | 29 (4.3) | 21 (72.4) | 8 (27.6) |  |  |
 Currently exercising | |||||
  Yes | 620 (91.4) | 399 (64.4) | 221 (35.6) | 0.934 | 0.334 |
  No | 58 (8.6) | 41 (70.7) | 17 (29.3) |  |  |
 Currently drinking | |||||
  No | 612 (90.3) | 408 (66.7) | 204 (33.3) | 8.645 | 0.003 |
  Yes | 66 (9.7) | 32 (48.5) | 34 (51.5) |  |  |
Spouse/partner’s SES | |||||
 Educational attainment of spouse/partner | |||||
  Junior middle school or below | 94 (13.9) | 66 (70.2) | 28 (29.8) | 3.051 | 0.218 |
  High school or technical secondary school | 172 (25.4) | 117 (68.0) | 55 (32.0) |  |  |
  College or above | 412 (60.7) | 257 (64.2) | 155 (37.6) |  |  |
 Employment of spouse/partner | |||||
  Yes | 665 (98.1) | 431 (64.8) | 234 (35.2) | 0.001 | 0.970 |
  No | 13 (1.9) | 9 (69.2) | 4 (30.8) |  |  |
Spouse/partner’s behavioral lifestyle habits | |||||
 Drinking habit of spouse/partner in the last year | |||||
  No | 252 (37.2) | 119 (47.2) | 133 (52.8) | 54.998 | < 0.001 |
  Yes | 426 (62.8) | 321 (75.4) | 105 (24.6) |  |  |