Table 3.
Linear regression models examining the interaction of GERD and sleep position on sleep quality using a fully adjusted model.
| Right-Sided Sleep | Left-Sided Sleep | |||||
|---|---|---|---|---|---|---|
| β (95% CI) | R2 | P | β (95% CI) | R2 | P | |
| N1 sleep (%) | −0.13 (−3.49 to 3.24) | .392 | .94 | 0.45 (−3.16 to 4.06) | .392 | .81 |
| N2 sleep (%) | −1.06 (−4.40 to 2.28) | .118 | .53 | 0.02 (−3.56 to 3.60) | .118 | .99 |
| N3 sleep (%) | 3.45 (0.88 to 6.02) | .193 | .009* | −0.21 (−2.97 to 2.55) | .191 | .88 |
| REM sleep (%) | −2.10 (−2.68 to −0.65) | .131 | .035* | −0.14 (−2.23 to 1.95) | .130 | .90 |
| Sleep efficiency (%) | −8.56 (−13.04 to −4.09) | .199 | < .001* | −4.01 (−8.81 to 0.79) | .196 | .10 |
| Wake after sleep onset (minutes) | 27.45 (11.85 to 43.06) | .193 | .001* | 2.68 (−14.08 to 19.44) | .190 | .75 |
| Sleep onset latency (minutes) | 5.50 (−2.44 to 13.43) | .044 | .17 | 8.66 (0.16 to 17.15) | .044 | .046* |
| REM latency (minutes) | 26.71 (3.21 to 50.22) | .057 | .026* | 0.70 (−22.52 to 23.92) | .055 | .95 |
| Total sleep time (minutes) | −35.64 (−56.15 to −15.14) | .206 | .001* | −16.54 (−38.55 to 5.47) | .204 | .14 |
| Arousal index | 1.54 (−1.83 to 4.91) | .439 | .37 | 0.25 (−3.37 to 3.86) | .438 | .89 |
Fully adjusted model: covariates include age, sex, BMI, AHI, periodic limb movements, insomnia, depression, neuropathic pain, and fibromyalgia. *P < .05. CI = confidence interval, REM = rapid eye movement.