Table 1

Univariable meta-regression of NRT studies

Covariates

Point estimate

Lower 95% limit

Upper 95% limit

OR

Lower 95% limit

Upper 95% limit

p-value


Placebo

0.13

-0.03

0.31

1.13

0.97

1.36

0.12

Sequence generation

-0.15

-0.32

0.006

0.86

0.72

1.00

0.06

Allocation concealment

-0.20

-0.39

0.01

0.81

0.67

1.01

0.03

Gum

-0.18

-0.32

-0.02

0.83

0.72

0.98

0.02

Patch

0.0007

-0.15

0.16

1.00

0.86

1.17

0.99

CO

0.52

0.24

0.80

1.68

1.27

2.22

0.0002

Cotinine

-0.21

-0.37

-0.05

0.81

0.69

0.95

0.007

Serum

-0.36

-0.75

0.01

0.69

0.47

1.01

0.06

Urine

-0.36

-0.70

-0.02

0.69

0.49

0.98

0.03

Planned to quit

0.12

-0.02

0.27

1.12

0.98

1.30

0.10


Legend. The point estimate and 95% CIs estimate the unit change in the effect size, whenever the predicted covariate is present. The OR for the point estimates and 95% CI denote the likelihood of covariate affecting the trial effect size.

Wu et al. BMC Public Health 2006 6:300   doi:10.1186/1471-2458-6-300

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