Table 2. Characteristics of patients declining and accepting CPAP in the control and Incentive groups.
| Control group | Incentive group | |||
| Declined CPAP (N = 81, 66.9%) | Accepted CPAP (N = 40, 33.1%) | Declined CPAP (N = 72, 52.6%) | Accepted CPAP (N = 65, 47.4%) | |
| Males (%) | 74.1 | 90.0 | 80.6 | 76.9 |
| Age (years) | 51.1±11.8 | 50.3±8.3 | 47.1±10.1 | 54.4±9.9† |
| BMI (kg/m2) | 31.2±6.5 | 32.5±4.8 | 31.2±5.3 | 33.5±5.4 |
| AHI (events/hour) | 37.3±20.1 | 45.3±23.4* | 36.1±20.5 | 41.5±19.1* |
| ESS (score) | 9.9±4.8 | 10.3±4.9 | 10.7±5.3 | 9.5±5.3 |
| Tobacco Smoking (pack/year) | 22.8±24.7 | 25.5±28.1 | 9.7±19.7 | 17.0±28.2‡ |
| HTN/CVD prevalence (%) | 50.6 | 45.0 | 47.2 | 56.9 |
| Live with Partner (%) | 84.0 | 92.5 | 84.7 | 86.2 |
| Income (low, average/high) | ||||
| Low (%) | 45.7 | 30.0 | 40.3 | 53.8+ |
| Average/High (%) | 54.3 | 70.0 | 59.7 | 46.2+ |
| CPAP pressure (cmH2O) | 8.4±2.6 | 9.0±2.4 | 8.2±2.2 | 8.7±2.8 |
| AHI on CPAP (events/hour) | 5.2±2.3 | 5.3±2.5 | 5.2±2.7 | 3.3±2.8 |
AHI – apnea-hypopnea index, BMI – body mass index, CPAP – continuous positive airway pressure, CVD – cardiovascular disease, ESS – Epworth Sleepiness Scale, HTN – hypertension, Income – individual monthly income relative to average monthly income level in Israel.
*p<0.05,
†
p<0.001 comparing CPAP declined with CPAP accepting in each group.
‡
p<0.05 comparing CPAP accepting patients in the control and incentive groups.
+p<0.05 comparing CPAP accepting and CPAP declined in the incentive group.
Values are mean±SD.