Table 3.
Factors associated with non-left side sleep position (n = 375)
| Variable | Left side sleep | Non-left sleep | Univariable OR | Adjusted OR |
|---|---|---|---|---|
| (n = 114) | (n = 261) | (95% CI) | (95% CI) | |
| n (row %) | n (row %) | |||
| Maternal age (years) [mean (SD)] | 28.6 (5.7) | 27.0 (5.4) | 0.95 (0.91–0.99)* | 0.97 (0.92–1.01) |
| Ethnicity (prioritised) | ||||
| Maori | 23 (26.4) | 64 (73.6) | 2.12 (1.11–4.05)* | 2.64 (1.23–5.66)* |
| Pacific | 43 (27.9) | 111 (72.1) | 1.96 (1.12–3.45)* | 2.91 (1.46–5.78)* |
| Asian | 13 (24.5) | 40 (75.5) | 2.34 (1.09–5.03)* | 1.79 (0.79–4.05) |
| European & Other | 35 (43.2) | 46 (56.8) | Reference | Reference |
| Live with partner | ||||
| No | 19 (27.1) | 51 (72.9) | Reference | Reference |
| Yes | 95 (31.2) | 210 (68.9) | 0.82 (0.46–1.47) | 1.36 (0.70–2.65) |
| Gestational age (weeks) [mean (SD)] | 35.3 (3.6) | 35.3 (3.4) | 1.01 (0.94–1.07) | 1.03 (0.96–1.10) |
| BMI [mean (SD)] | 34.9 (7.6) | 32.5 (7.1) | 0.96 (0.93–0.99)* | 0.93 (0.89–0.96)* |
| Sleeping on left side of bed | ||||
| No | 43 (20.0) | 172 (80.0) | 3.19 (2.02–5.04)* | 3.29 (2.03–5.32)* |
| Yes | 71 (44.4) | 89 (55.6) | Reference | Reference |
| Received any advice on sleep position | ||||
| No | 36 (30.3) | 83 (69.8) | 1.01 (0.63–1.62) | 0.99 (0.59–1.66) |
| Yes | 78 (30.5) | 178 (69.5) | Reference | Reference |
OR Odds ratio, CI Confidence interval, BMI Body mass index
*Statistically significant (p ≤ 0.05)
Multivariable model is adjusted for all the variables in the table
Maternal age, gestational age, and BMI were treated as continuous variables and ORs are for a 1 unit increase