Univariable and multivariable odds of late stillbirth associated with perceptions of fetal movements
| Univariable OR (95% CI) | Multivariable* OR (95% CI), p values | |
| Combination of strength and frequency changes in the last 2 weeks (prioritised variable) | ||
| Increased strength | 0.18 (0.13 to 0.26) | 0.14 (0.08 to 0.24) |
| Increased frequency but not strength | 0.57 (0.25 to 1.32) | 0.86 (0.30 to 2.52) |
| Decreased frequency | 3.45 (2.20 to 5.43) | 4.51 (2.38 to 8.55) |
| Unsure strength or frequency | 2.04 (1.04 to 3.98) | 2.02 (0.77 to 5.25) |
| Same | Reference | Reference: χ2=104.90, p<0.0001 |
| During the last 2 weeks, did you notice anytime that your baby was more vigorous than usual | ||
| No | Reference | Reference: χ2=12.43, p=0.002 |
| Once | 1.47 (0.94 to 2.31) | 2.10 (1.06 to 4.17) |
| More than once | 0.34 (0.25 to 0.47) | 0.59 (0.37 to 0.96) |
| How often did you feel your baby having hiccups in the last 2 weeks | ||
| Never | Reference | Reference: χ2=5.95, p=0.007 |
| Unsure if felt | 0.73 (0.39 to 1.35) | 0.90 (0.42 to 1.93) |
| Once | 0.69 (0.37 to 1.27) | 0.85 (0.35 to 2.05) |
| Occasionally | 0.44 (0.32 to 0.62) | 0.75 (0.45 to 1.26) |
| Daily | 0.32 (0.21 to 0.48) | 0.31 (0.17 to 0.56) |
| Unsure of frequency | 0.37 (0.17 to 0.80) | 0.50 (0.07 to 3.44) |
*Controls for age, ethnicity, parity, education, marital status, smoking in pregnancy, customised birthweight centile, going-to-sleep position, sleep duration, got up to toilet in the night, naps in the daytime, gestation and study centre.