Table 1
Partial regression coefficients (β) and standard errors (SE) for the blood pressure predictor variables in the mixed model analyses of monozygotic smoking discordant twin pairs
| Monozygotic men | Monozygotic women | ||||||
|---|---|---|---|---|---|---|---|
| β (SE) | t(9), p value | β (SE) | t(9), p value | ||||
| Systolic blood pressure (mm Hg) | |||||||
| Intercept | 164.47 (12.43) | 157.06 (8.50) | |||||
| Tobacco smoking | 22.10 (13.02) | 1.70, 0.12 | 9.38 (9.51) | 0.99, 0.35 | |||
| Hypertension medication | −11.15 (18.08) | −0.62, 0.55 | 3.59 (11.56) | 0.31, 0.76 | |||
| Age | −5.55 (5.64) | −0.98, 0.35 | 1.68 (3.12) | 0.54, 0.60 | |||
| Body mass index | 1.29 (2.30) | 0.56, 0.59 | 3.31 (1.61) | 2.06, 0.07 | |||
| Alcohol consumption | −0.12 (0.07) | −1.77, 0.11 | 0.77 (0.85) | 0.90, 0.39 | |||
| Diastolic blood pressure (mm Hg) | |||||||
| Intercept | 78.08 (6.96) | 84.92 (4.05) | |||||
| Tobacco smoking | 11.88 (7.00) | 1.70, 0.12 | 2.60 (6.12) | 0.42, 0.68 | |||
| Hypertension medication | 0.28 (9.98) | 0.03, 0.98 | −0.20 (5.93) | −0.03, 0.97 | |||
| Age | −3.57 (3.19) | −1.12, 0.29 | 2.96 (1.16) | 2.55, 0.031-150 | |||
| Body mass index | 0.69 (1.27) | 0.54, 0.60 | 0.48 (0.77) | 0.62, 0.55 | |||
| Alcohol consumption | −0.03 (0.04) | −0.86, 0.41 | 0.76 (0.36) | 2.13, 0.06 | |||
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↵1-150 p<0.05 (statistically significant). The continuous regressors age (years), body mass index (kg/m2), and alcohol consumption (alcohol servings per month) were centred about their means in the mixed model analyses. The means of these regressors were 83.58 years, 24.49 kg/m2, and 4.44 servings/month, respectively.
