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Effect of BZD on TST in COPD patients with insomnia.
Notes: #Flunitrazepam; *nitrazepam. Data was analyzed by Review Manager 5.3. Heterogeneity was predefined as I2>50%. The random-effect model was used if heterogeneity was observed. Otherwise, the fixed-effect model was used.
Abbreviations: BZD, benzodiazepine; TST, total sleep time; SD, standard deviation; SMD, standardized mean difference; IV, independent variable; CI, confidence interval.
