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. 2019 Jan 18;5:1. doi: 10.1186/s40733-019-0048-y

Fig. 1.

Fig. 1

Factors Associated with Exacerbation Levels. Crude and adjusted odds ratios (ORs) for exacerbation levels (0, 1–2, 3–4, 5+ exacerbations) as the outcome were obtained using unadjusted and adjusted proportional odds logistic regression models. Crude and adjusted ORs and 95% confidence intervals (CIs) are shown and adjusted values are plotted