Variable | Univariate OR (95% CI) | Walds Chi2 p-value | Multivariate OR (95% CI) | Walds Chi2 p-value |
|---|
HMV duration (months) | 1.51 (1.34–1.72) | p < 0.001 | 1.65 (1.42–1.91) | p < 0.001 |
Indication for HMV |
 RCWD | 30.00 (2.22–405.98) | p = 0.011 | 66.86 (3.63–1232.65) | p = 0.005 |
 OHS | 9.84 (1.22–79.18) | p = 0.032 | 13.04 (1.35–132.73) | p = 0.027 |
- Logistic regression was used to identify variables closely related to improvement in RDW values (defined as clinically relevant improvement of 0.5% from baseline) including data from each study time point (n = 262). After univariate analysis of possible predictors (age, sex, haemoglobin value, HMV duration, HMV indication, interface type, referral type, paO2, paCO2), all significant variables and previously cited possible prognostic factors (age, sex, haemoglobin value) of RDW were entered into multivariate logistic analysis
- OR odds ratio, CI confidence interval, HMV home mechanical ventilation, OHS obesity hypoventilation syndrome, RCDW restrictive chest wall disease
