The Role of Daytime Sleepiness in Psychosocial Outcomes after Treatment for Obstructive Sleep Apnea
Table 1
Participants’ characteristics and OSA group CPAP treatment information.
OSA before CPAP (A) ()
OSA after CPAP (B) ()
Controls (C) ()
A versus B (df)
B versus C (df)
Age (years)
57.9 (9.5)a
56.7 (10.5)
0.48 (62)
Sex (F : M)
15 : 22
19 : 8
Education (years)
15.1 (3.6)
15.7 (3.2)
0.61 (62)
Body mass index (BMI)
33.5 (7.4)
25.5 (5.0)
4.83 (62)***
Time since diagnosis of OSA (months)
25.6 (21.1)
Duration of CPAP treatment (months)
17.8 (11.4)
Usage of CPAP per week (hours)
51.4 (6.7)
CPAP complianceb
96.1 (5.6)
Respiratory disturbance index (RDI)
42.2 (24.9)
1.7 (1.5)
4.0 (3.4)
9.52 (32)***
3.25 (62)**
Minimum oxygen saturation (min SpO2)
80.2 (9.8)
90.3 (3.6)
88.6 (3.3)
5.61 (27)***
1.90 (60)
Mean oxygen saturation (mean SpO2)
93.7 (3.5)
95.7 (1.6)
95.7 (0.9)
3.17 (29)**
0.10 (62)
Epworth Sleepiness Scale (ESS)
14.4 (5.2)
8.3 (4.5)
6.6 (4.7)
7.52 (36)***
1.48 (62)
Pittsburg Sleep Quality Index—global score
8.5 (3.3)
4.4 (2.4)
4.6 (2.8)
5.85 (27)***
0.20 (62)
CPAP: continuous positive airway pressure.
aMean (SD).
bCPAP compliance is defined as percentage of days with usage >4 hours in the last 3 months. Compliance was determined objectively by downloading data from the built-in smart card of the CPAP machines for 73% of the participants. Self-report of usage was used for the rest of the participants whose machines were not equipped with a smart card.
**
P < .01, ***P < .001.
