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Table 9 Meta-regression analysis for difference in SBP between smokers and non-smokers

From: Relationship of cardiometabolic parameters in non-smokers, current smokers, and quitters in diabetes: a systematic review and meta-analysis

Covariate N studies Coefficient (95% CI) p value
Mean study age 8 0.129 (0.017, 0.241) 0.30
Study age criteria (under 22 or over 18) 8 4.51 (−0.68, 9.69) 0.078
Type I or Type II diabetes 8 2.46 (−3.84, 8.75) 0.377
Male (percent) 8 0.12 (−0.04, 0.29) 0.126
Study design 8 0.28 (−9.84, 10.41) 0.948
Duration smoked 3 0.36 (−3.92, 4.63) 0.482