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. 2016 Apr 4;11:675–685. doi: 10.2147/COPD.S98082

Figure 13.

Figure 13

The effect of BZD on max tcPCO2 increase during sleep in COPD patients with insomnia.

Notes: #Flunitrazepam; *nitrazepam.

Abbreviations: BZD, benzodiazepine; tcPCO2, transcutaneous carbon dioxide pressure; SD, standard deviation; WMD, weighted mean difference; IV, independent variable; CI, confidence interval.