Table 3.
Intergroup comparison of characteristics and sleep parameters of participants
| Group | Insomnia group (n=16) |
Comorbid SAHS group (n=10) | Z/
2
Value |
P value |
| Age | 41.68 (10.33) | 42.30 (7.95) | 0.106 | 0.916 |
| Sex (male/female, case) | 6/10 | 8/2 | 4.473 | 0.034* |
| BMI | 22.77 (2.61) | 24.42 (3.09) | 1.476 | 0.140 |
| ISI | 5.87 (4.28) | 10.60 (5.16) | 2.115 | 0.034* |
| SRQ | 2.87 (3.07) | 6.30 (3.12) | 2.415 | 0.016* |
| TST (min) | 432.31 (59.34) | 457.60 (45.85) | 1.081 | 0.280 |
| SE (%) | 85.77 (4.48) | 87.33 (5.69) | 0.659 | 0.510 |
| LS (%) | 46.33 (9.17) | 47.11 (6.31) | 0.211 | 0.833 |
| DS (%) | 21.50 (5.81) | 19.90 (6.70) | 1.107 | 0.268 |
| REM (%) | 17.94 (2.45) | 21.19 (5.50) | 1.450 | 0.147 |
| ODI | 3.58 (2.87) | 36.29 (10.25) | 4.217 | p<0.001* |
| Frequency of oxygen desaturation | 27.37 (17.21) | 278.40 (90.76) | 4.219 | p<0.001* |
| TS90% | 0.51 (1.63) | 11.17 (14.42) | 3.393 | p<0.001* |
| MSpO2 | 97.28 (1.59) | 94.43 (2.04) | 3.374 | 0.001* |
| Pulse rate, P | 59.87 (7.31) | 65.40 (5.42) | 2.218 | 0.027* |
*p<0.05
BMI, body mass index; DS, deep sleep stage; ISI, Insomnia Severity Index; LS, light sleep stage; MSpO2, mean percutaneous oxygen saturation; ODI, oxygen desaturation index; SE, sleep efficiency; SRQ, self-reporting questionnaire; TS90%, percentage of time spent at SpO2 below 90%; TST, total sleep time.