Table 10.

Meta-regression analysis for difference in DBP between smokers and non-smokers

Covariate	N studies	Coefficient (95% CI)	p value
Mean study age	8	0.08 (−0.02, 0.17)	0.102
Study age criteria (under 22 or over 18)	8	3.47 (0.02, 6.73)	0.041
Type I or Type II diabetes	8	1.26 (−3.36, 5.89)	0.529
Male (percent)	8	0.11 (0.02, 0.20)	0.027
Study design	8	0.57 (−6.55, 7.71)	0.850
Duration smoked	3	0.38 (−3.33, 4.09)	0.410

The italic values were to indicate statistical significance. A value of <0.05 was statitically significant