Table 2 Distribution of Kaunas cohort study subjects for various characteristic by exposure
Risk factor/outcome | Low THM N (%) | Medium THM N (%) | High THM N (%) |
|---|---|---|---|
Maternal age | Â | Â | Â |
   < 20 years | 19 (1.8) | 17 (1.5) | 23 (2.1) |
   20-29 years | 652 (60.1) | 688 (59.7) | 658 (59.6) |
   ≥ 30 years | 414 (39.2) | 447 (38.8) | 423 (38.3) |
Marital status | Â | Â | Â |
   Married | 876 (80.7) | 958 (83.2) | 910 (82.4) |
   Not married | 209 (19.3) | 194 (16.8) | 194 (17.6) |
Maternal education | Â | Â | Â |
   Primary school | 59 (5.4) | 50 (4.3) | 57 (5.2) |
   Secondary school | 454 (41.8) | 465 (40.4) | 442 (40.0) |
   University degree | 572 (52.7) | 637 (55.3) | 605 (54.8) |
   Maternal smoking |  |  |  |
   Nonsmoker | 1003 (92.4) | 1076 (93.4) | 1031 (93.4) |
   Smoker | 82 (7.6) | 76 (6.6) | 73 (6.6) |
Paternal smokinga | Â | Â | Â |
   Nonsmoker | 574 (53.4) | 629 (55.4) | 545 (49.8) |
   Smoker | 501 (46.6) | 507 (44.6) | 550 (50.2) |
Alcohol consumptiona | Â | Â | Â |
   No | 1000 (92.2) | 1094 (95.0) | 1048 (94.9) |
   Yes | 85 (7.8) | 58 (5.0) | 56 (5.1) |
Blood pressure | Â | Â | Â |
   <140/80 mm/Hg | 969 (89.3) | 1020 (88.5) | 977 (88.5) |
   ≥140 or ≥ 90 mm/Hg | 116 (10.7) | 132 (11.5) | 127 (11.5) |
Ethnic group | Â | Â | Â |
   Lithuanian | 1054 (97.1) | 1117 (97.0) | 1082 (98.1) |
   Other | 31 (2.9) | 35 (3.0) | 21 (1.9) |
Parity | Â | Â | Â |
   No child | 492 (45.3) | 499 (43.3) | 516 (46.7) |
   ≥ 1 child | 593 (54.7) | 653 (56.7) | 588 (53.3) |
Infant gender | Â | Â | Â |
   Male | 559 (51.5) | 611 (53.0) | 544 (49.3) |
   Female | 526 (48.5) | 541 (47.0) | 560 (50.7) |
Current residence | Â | Â | Â |
   1-4 years | 437 (40.3) | 492 (42.7) | 472 (42.8) |
   5-9 years | 257 (23.7) | 288 (25.0) | 296 (26.8) |
   ≥ 10 years | 391 (36.0) | 372(32.3) | 336 (30.4) |
Work exposure | Â | Â | Â |
   No | 996 (91.8) | 1053 (91.4) | 999 (90.5) |
   Yes | 89 (8.2) | 99 (8.6) | 105 (9.5) |
Chronic disease | Â | Â | Â |
   No | 825 (76.0) | 858 (74.5) | 844 (76.4) |
   Yes | 260 (24.0) | 294 (25.5) | 260 (23.6) |
Previous preterm delivery | Â | Â | Â |
   No | 1069 (98.5) | 1123 (97.5) | 1087 (98.5) |
   Yes | 16 (1.5) | 29 (2.5) | 17 (1.5) |
Socio economic status | Â | Â | Â |
   Low income | 335 (30.9) | 337 (29.3) | 338 (30.6) |
   Medium income | 582 (53.6) | 642 (55.7) | 600 (54.3) |
   High income | 168 (15.5) | 173 (15.0) | 166 (15.0) |
Body mass index (kg/m2) | Â | Â | Â |
   <25 Normal | 618 (57.0) | 677 (58.8) | 679 (61.5) |
   25-30 Overweight | 329 (30.3) | 334 (29.0) | 284 (25.7) |
   30 Obesity | 138 (12.7) | 141 (12.2) | 141 (12.8) |
Water filter | Â | Â | Â |
   Yes | 341 (31.4) | 336 (29.2) | 338 (30.6) |
   No | 744 (68.6) | 816 (70.8) | 766 (69.4) |
LBWa | Â | Â | Â |
   Yes | 40 (3.7) | 51 (4.4) | 65 (5.9) |
   No | 1045 (96.2) | 1101 (95.7) | 1039 (94.1) |
SGA | Â | Â | Â |
   Yes | 76 (7.0) | 92 (8.0) | 102 (9.2) |
   No | 1009 (93.0) | 1060 (92.0) | 1002 (90.8) |
Mean birth weight (SDs) | 3449 (517) | 3462 (524) | 3430 (559) |