TABLE 2.
Association between physical activity and pregnancy loss among women in the Effects of Aspirin in Gestation and Reproduction study (N = 785).
| Pregnancies (N = 785) | Physical activity tertile (T) [MET, hours/week] | Cases | Unadjusted RR (95% CI) | Age-adjusted RR (95% CI) | Model 2a RR (95% CI) |
|---|---|---|---|---|---|
| Any pregnancy loss (n = 188) | T1 [0–16.6] | 59 | Referent | Referent | Referent |
| T2 [16.6–50.8] | 66 | 1.11 (0.82, 1.51) | 1.09 (0.80, 1.48) | 1.10 (0.81, 1.50) | |
| T3 [51.3–275.1] | 63 | 1.06 (0.78, 1.45) | 1.08 (0.79, 1.47) | 1.09 (0.80, 1.49) | |
| Clinical loss (n = 133) | T1 [0–16.6] | 48 | Referent | Referent | Referent |
| T2 [16.6–50.8] | 43 | 0.89 (0.61, 1.30) | 0.87 (0.60, 1.26) | 0.88 (0.60, 1.28) | |
| T3 [51.3–275.1] | 42 | 0.87 (0.60, 1.27) | 0.89 (0.61, 1.29) | 0.90 (0.62, 1.31) | |
| hCG-detected loss (n = 55) | T1 [0–16.6] | 11 | Referent | Referent | Referent |
| T2 [16.6–50.8] | 23 | 2.08 (1.04, 4.19) | 2.08 (1.04, 4.18) | 2.06 (1.03, 4.14) | |
| T3 [51.3–275.1] | 21 | 1.90 (0.94, 3.86) | 1.90 (0.94, 3.87) | 1.92 (0.94, 3.90) |
Note: CI = confidence interval; MET = metabolic equivalent; RR = risk ratio; W-H ratio = waist-hip ratio.
a
Model 2 includes age and W-H ratio.