Age, sex, focred vital capacity (FVC), and daytime oxygen level (Sao 2) as predictors of nocturnal hypoxaemia
| Mean overnight Sao2 | Abnormal sleep study (more than 2% of time with Sao2<90%) | ||||||
|---|---|---|---|---|---|---|---|
| Regression coefficient1-150 | 95% CI | p value | Odds ratio1-150 | 95% CI | p value | ||
| Sex | –0.37 | –3.04 to 2.31 | 0.8 | 1.24 | 0.38 to 4.11 | 0.7 | |
| Age | –0.04 | –0.19 to 0.10 | 0.6 | 1.01 | 0.95 to 1.08 | 0.7 | |
| FVC (% predicted) | 0.018 | –0.04 to 0.08 | 0.5 | 0.99 | 0.97 to 1.02 | 0.6 | |
| Capillary oxygen concentration | 1.94 | 1.22 to 2.66 | <0.001 | 0.46 | 0.26 to 0.82 | 0.002 | |
↵1-150 Regression coefficients are for the change in mean overnight Sao 2 predicted by womenv men and for each increase in year of age, percentage predicted FVC, and kPa of daytime oxygen. Regression coefficients and odds ratios were all adjusted for the effects of age and sex.