Table 2.
Regression coefficients for effects of predictors of systolic blood pressure at age 9 adjusted for other variables in model
| Direct effect (95% CI) | Indirect effect (95% CI) | Total effect (95% CI) | |
|---|---|---|---|
| Sex | 0.76 (−0.20 to 1.72) | −0.02 (−0.39 to 0.35) | 0.74 (−0.27 to 1.75) |
| Twin | −4.31(−7.32 to −1.30) | −0.80 (−2.13 to 0.54) | −5.11 (−8.18 to −2.03) |
| Maternal smoking in pregnancy | 1.34 (0.31 to 2.38) | 0.20 (−0.19 to 0.59) | 1.54 (0.45 to 2.63) |
| Maternal smoking status (unknown) | 1.77 (−0.54 to 4.08) | −0.40 (−1.25 to 0.46) | 1.37 (−1.08 to 3.81) |
| Low socioeconomic status | −0.34 (−1.48 to 0.81) | −0.02 (−0.44 to 0.41) | −0.35 (−1.57 to 0.87) |
| Mother unmarried | −1.42 (−3.83 to 0.98) | 1.24 (0.34 to 2.15) | −0.18 (−2.72 to 2.36) |
| Mother’s height (cm) | −0.02 (−0.11 to 0.07) | 0.09 (0.05 to 0.14) | 0.07 (−0.02 to 0.16) |
| Current height (cm) | 0.33 (0.23 to 0.43) | — | 0.33 (0.23 to 0.43) |
| Current body mass index (kg/m2) | 0.92 (0.63 to 1.21) | — | 0.92 (0.63 to 1.21) |
| Birth weight (kg) | −1.93 (−2.89 to −0.96) | 1.06 (0.67 to 1.46) | −0.87 (−1.86 to 0.13) |