Table 3.
Titration metrics
| Variables | SN-PSG (N=422) | FN-PSG (N=306) | P-value |
|---|---|---|---|
| Benzo taken on PSG night (% of cohort) | 6.4 | 8.5 | 0.35 |
| Full-face mask (% of cohort) | 31.7 | 12.1 | <0.00a |
| Maximum CPAP | 10.1 (2.9) | 8.9 (2.6) | <0.00a |
| BiPAP (% of cohort) | 18.7 | 5.6 | <0.00a |
| Maximum IPAP | 15.4 (3.2)b | 11.5 (3.1)b | <0.00a |
| Maximum EPAP | 11.8 (3.2)b | 7.6 (3.3) | <0.00a |
| CAI (/hr) during titration | 4.6 (9.0) | 1.9 (3.5) | <0.00a |
Notes: Data are either mean (SD), or percentage for benzo use on PSG night, full-face mask, and BiPAP (binary variables).
a
Significantly different (P<0.01).
b
Normally distributed (Shapiro–Wilk P<0.05).
Abbreviations: PSG, polysomnography; SN-PSG, split-night polysomnography; FN-PSG, full-night polysomnography; Benzo, benzodiazepines taken in lab; CPAP, continuous positive airway pressure; IPAP, inspiratory PAP; EPAP, expiratory PAP; BiPAP, bilevel positive airway pressure; CAI, central apnea index; SD, standard deviation.