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. 2008 Jul 30;102(11):1575–1580. doi: 10.1016/j.rmed.2008.06.006

Table 4.

Respiratory viral infection group comparisons

Groups Odds ratio (95% CI) Relative risk (95% CI) p value
Exacerbated vs stable 4.4 (1.8–10.8) 3.1 (1.6–6.2) 0.0002
Stable vs NOSa 0.9 (0.2–7.2) 0.9 (0.2–4.0) 0.93
a

Non-obstructed smokers (NOS), patients who have smoked but who have normal spirometry.