. Author manuscript; available in PMC: 2012 Apr 1.

Published in final edited form as: Respir Med. 2010 Dec 10;105(4):588–594. doi: 10.1016/j.rmed.2010.11.015

Table 4.

Multivariate model for frequent exacerbations in subgroup with MMRC score

Variable	Unadjusted OR [95%CI]	p-value	Adjusted OR [95% CI]	p-value
FEF_25–75 % predicted^*^†	0.6 [0.39–0.91]	0.02	0.53 [0.28–0.98]	0.04
MMRC score	1.46 [1.13–1.89]	0.004	1.50 [1.15–1.97]	0.003
Physician diagnosed asthma	1.61 [0.94–2,74]	0.08	2.05 [1.16–3.64]	0.01
FEV1 % predicted^*^†	0.77 [0.58–1.03]	0.08	1.08 [0.71–1.64]	0.71

MMRC = modified Medical Research Council. n = 267 (148 frequent/119 non-exacerbators).

Post bronchodilator values,

^†

data are reported as per 10% change in predicted value. Non-significant variables tested but not retained in the final model include current smoking, age, wheezing, chronic cough, history of hypertension, maternal history of COPD, and sex. FEV1 % predicted was force included into the model.