90 of 233 participants) with metformin plus rosiglitazone,
and 46.6% (95% CI, 40.2 to 53.0; 109 of
234 participants) with metformin plus lifestyle intervention
(Fig. 2). Metformin plus rosiglitazone
was associated with a 25.3% decrease in the occurrence
of the primary outcome as compared with
metformin alone (P = 0.006); the outcome withmetformin plus lifestyle intervention was intermediate
but did not differ significantly from the
outcome with metformin alone or with metformin
plus rosiglitazone. The reasons for treatment
failure and the median time to failure did not
differ significantly across treatments (see Section
D in the Supplementary Appendix).