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