Table 1 Sociodemographic characteristics of the study population (N = 830) according to categories of self-reported nightly sleep duration during early pregnancy
Categories of hours of sleep during pregnancy | ||||
|---|---|---|---|---|
≤ 5 hours | 6 hour | 7-8 hours | ≥9 hours | |
Characteristics | N = 28 | N = 44 | N = 485 | N = 273 |
Maternal age (years) | 29.6 ± 5.6 | 31.4 ± 4.1 | 32.0 ± 4.5 | 31.6 ± 4.6 |
18-25 | 6 (21.4) | 3 (6.8) | 23 (4.7) | 9 (3.3) |
25-34 | 16 (57.1) | 33 (75.0) | 331 (68.3) | 193 (70.7) |
≥ 35 | 6 (21.4) | 8 (18.2) | 131 (27.0) | 71 (26.0) |
Maternal race/Ethnicity | ||||
Non-Hispanic White | 26 (92.9) | 37 (84.1) | 417 (86.0) | 236 (86.5) |
African American | 0 (0.0) | 3 (6.8) | 10 (2.0) | 3 (1.1) |
Other | 2 (7.1) | 4 (9.1) | 58 (12.0) | 34 (12.4) |
Payment status | ||||
Insurance | 21 (75.0) | 37 (84.1) | 432 (89.1) | 245 (89.7) |
Medicaid | 4 (14.3) | 3 (6.8) | 9 (1.8) | 10 (3.7) |
Missing | 3 (10.7) | 4 (9.1) | 44 (9.1) | 18 (6.6) |
Nulliparous | 23 (82.1) | 34 (77.3) | 408 (84.1) | 252 (92.3) |
Not married | 11 (39.3) | 6 (13.6) | 54 (11.1) | 27 (9.9) |
< 12 years of education | 3 (10.7) | 1 (2.3) | 27 (5.6) | 10 (3.7) |
Smoked during pregnancy | 3 (10.7) | 2 (4.6) | 30 (6.2) | 19 (7.0) |
Physically inactive during pregnancy | 8 (28.6) | 5 (11.4) | 81 (16.7) | 46 (16.9) |
Pre-pregnancy BMI | 23.0 ± 4.8 | 22.3 ± 4.0 | 23.2 ± 4.8 | 23.7 ± 5.3 |
(kg/m2) | ||||
< 18.5 | 2 (7.1) | 4 (9.1) | 20 (4.1) | 9 (3.3) |
18.5 – 24.9 | 21 (75.0) | 30 (68.2) | 359 (74.0) | 196 (71.8) |
25-29.9 | 2 (7.1) | 8 (18.2) | 68 (14.0) | 44 (16.1) |
≥ 30.0 | 3 (10.7) | 2 (4.5) | 38 (7.9) | 24 (8.8) |
Mean systolic blood pressure in first trimester (mmHg) | 114.2 ± 10.4 | 114.3 ± 9.4 | 112.5 ± 10.0 | 112.6 ± 10.2 |
Mean diastolic blood pressure in first trimester (mmHg) | 69.2 ± 6.3 | 69.2 ± 7.0 | 70.3 ± 7.2 | 69.8 ± 7.0 |
Mean arterial blood pressure in first trimester (mmHg) | 84.2 ± 6.9 | 84.2 ± 7.0 | 84.4 ± 7.3 | 84.1 ± 7.2 |
Gestational age at blood collection (weeks) | 12.9 ± 3.0 | 14.5 ± 3.3 | 13.7 ± 3.5 | 13.6 ± 3.2 |