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## Figure 2.
CPAP compliance (hour/night) with APAP versus fixed CPAP: meta-analysis, with subgroup
analyses by minimum AHI threshold. Estimates and 95% CIs by study subgrouped by minimum AHI threshold used in each
study. The overall random effects model meta-analysis is displayed by the black diamond,
which spans the width of the 95% CI. Each subgroup meta-analysis, by AHI threshold,
is shown by the open diamonds. Grey boxes are proportional to the weight of each study
in the overall meta-analysis. For each meta-analysis the I^{2 }statistic and the P value for heterogeneity is displayed. The P value for the summary estimate is displayed next to the black diamond. Note that studies
favoring APAP are to the right of the vertical 0 line. Base AHI: baseline apnea-hypopnea
index (events/hour) in fixed CPAP group; compliance fixed: compliance (hour/night)
in fixed CPAP group; fixed: fixed CPAP.
Ip |