Table 2.
Pregnant women’s survey: demographic factors and sleep-on-side advice associated with going-to-sleep position last night
| Variable | Supine last night n=30 |
Non-supine last night n=1587 |
Univariable OR (95% CI) |
| Gestation at participation | 34.0 (30.0–37.0) | 34.0 (30.0–37.0) | 1.03 (0.93 to 1.13) |
| Maternal age (years) | 29.0 (23.0–34.0) | 30.0 (26.0–33.0) | 0.98 (0.92 to 1.05) |
| Ethnicity | |||
| European | 9 (30.0) | 927 (58.4) | 1 |
| Māori | 12 (40.0) | 245 (15.4) | 5.05 (2.10 to 12.1) |
| Pacific | 5 (16.7) | 172 (10.8) | 2.99 (0.99 to 9.04) |
| Indian | 0 | 88 (5.6) | – |
| Asian-non-Indian* | 4 (13.3) | 98 (6.2) | 4.20 (1.27 to 13.90) |
| Other ethnicity | 0 | 57 (3.4) | – |
| Marital status | |||
| Single | 10 (33.3) | 108 (6.8) | 10.98 (4.25 to 28.42) |
| Cohabitating couple | 12 (40.0) | 530 (33.4) | 2.69 (1.09 to 6.61) |
| Married couple | 8 (26.7) | 949 (59.8) | 1 |
| Parity | |||
| 0 | 16 (53.3) | 861 (54.3) | 0.96 (0.47 to 1.99) |
| 1+ | 14 (46.7) | 726 (45.8) | 1 |
| Lead maternity provider | |||
| Midwifery continuity of care | 21 (70.0) | 1310 (82.6) | 1 |
| Private obstetrician | 2 (6.7) | 106 (6.7) | 1.18 (0.27 to 5.09) |
| Hospital-based midwife/doctor | 7 (23.3) | 171 (10.8) | 2.55 (1.07 to 6.10) |
| Education level | |||
| Primary-secondary | 14 (46.7) | 419 (26.4) | 2.80 (1.32 to 6.08) |
| Tertiary | 13 (43.3) | 1103 (69.5) | 1 |
| Overseas | 3 (10.0) | 65 (4.1) | 3.92 (1.09 to 14.09) |
| Location | |||
| Urban | 19 (63.3) | 1087 (68.5) | 1 |
| Rural | 11 (36.7) | 500 (31.5) | 1.26 (0.60 to 2.66) |
| Gestation at first pregnancy visit | 8.5 (6.5–12.0) | 8.0 (6.0–10.0) | 1.04 (0.97 to 1.12) |
| First pregnancy body mass index (kg/m2) | 27.1 (21.5–32.1) | 25.1 (22.4–30.1) | 1.03 (0.98 to 1.09) |
| Received sleep-on-side advice | |||
| Yes | 15 (50.0) | 1381 (87.0) | 1 |
| No | 15 (50.0) | 206 (13.0) | 6.70 (3.23 to 13.92) |
Data are column number (percentage) or median (IQR).
Participants with no recall of going-to-sleep position last night (n=16) were excluded from the univariable model.
*Asian-non-Indian includes South East Asian (n=56), Chinese (n=31) and Asian other (n=25).