Table 1. Metaregression of weight changes per period.

Period	aripiprazole	asenapine	clozapine	FGA	haloperidol	olanzapine	quetiapine	risperidone	ziprasidone	placebo
≤6 wk*	0	0	0	0	0	0	0	0	0	0
6–16 wk	−0.46 −1.78–0.85		−2.37 −6.93–2.19	−2.19 −6.63–2.25	−0.25 −2.50–1.99	0.472 −0.16–1.60	0.05 −1.26–1.36	−0.58 −1.57–0.72	−0.97 −3.08–1.13	0.25 −0.14–0.64
16–38 wk	−1.43 −2.75–−0.12	−1.25 −5.98–3.48	−3.81 −8.18–0.55		2.75 −0.58–6.08	0.26−0.68–1.20	−0.54−1.94–0.86	−0,03 −1.03–0.96	−1.68 −3.78–0.41	−0.26 −0.81–0.28
>38 wk	−0.20 −1.64–1.24	0.74 −3.24–4.72	1.09 −3.47–5.66	2.79 −1.12–6.70	1.81 −0.53–4.15	1.74 0.50–2.99	−0.85 −2.56–0.87	0.37 −0.63–1.38	−0.50 −3.67–2.68	−1.08 −1.88–−0.29

The coeffecient indicates the changes of weight compared with the constant (period 1).

* period 1 (≤6 wk) is the reference category.

Data in italics indicate 95% confidence interval.

The data in bold indicate significant difference in weight change of reference category.