Table 2.

Equations for estimation of point prevalence abstinence (PP) from prolonged abstinence (PA) or vice versa from metaregression

Equationsa	Range of 90% of residualsb
logit PP = 0.00048n + 0.26 control + 0.82 logit PA	−5% to +4%
logit PA = −0.23 − 0.00044n − 0.26 control + 1.04 logit PP	−4% to +4%

Note. ^a n = sample size, control values are 0 = placebo control, 1 = nonplacebo control (e.g., no medication).

^bResiduals are the differences in predicted versus observed outcomes.