. Author manuscript; available in PMC: 2014 Sep 26.

Published in final edited form as: Surg Obes Relat Dis. 2008 Jul 17;4(5):632–639. doi: 10.1016/j.soard.2008.06.010

Table 3.

Rates of obstruction stratified by smoking and asthma status

	No asthma	Asthma	Total (by smoking, any asthma status)
Nonsmoker	9/53 (17)^*	7/23 (30)	16/76 (21)^†
Smoker	16/46 (35)^*	7/14 (50)	23/60 (38)^†
Total (by asthma, any smoking status)	25/99 (25)	14/37 (38)	39/136 (29)

Data presented as proportion of subjects with obstruction categorized by smoking and asthma; obstruction increased in frequency with smoking and showed a trend toward increased frequency with asthma diagnosis; trend also seen for additive effects.

All other P values nonsignificant.

P = .042, chi-square test and P = .063, Fisher’s exact test for smoker versus nonsmoker.

^†

P = .036, Fisher’s exact test, P = .027, chi-square test for smoker versus nonsmoker.