Smoking, leisure-time exercise and frequency of self-reported common cold among the general population in northeastern China: a cross-sectional study

Table 4 Results of ordinal logistic regression analyses for the related factors of the common cold^a

Variables	Statistical ordinal logistic parameters
	Model 1^b			Model 2^c
	β	OR(95% CI)	P-value	β	OR(95% CI)	P-value
Cigarette smoking categories
Non-smokers		Ref			Ref
Passive smokers	0.49	1.64(1.32–2.03)	< 0.001	0.46	1.59(1.27–1.99)	< 0.001
Past smokers	0.29	1.34(0.85–2.10)	0.207	0.28	1.32(0.84–2.09)	0.229
Light current smokers	0.18	1.19(0.80–1.77)	0.384	0.05	1.05(0.70–1.59)	0.801
Heavy current smokers	0.33	1.39(0.92–2.11)	0.121	0.24	1.26(0.81–1.96)	0.295
Frequency of leisure-time exercise
Low (< 4 days/month)		Ref			Ref
Medium (1–2 days/week)	− 0.11	0.89(0.71–1.13)	0.344	− 0.04	0.96(0.76–1.22)	0.764
High (≥3 days/week)	− 0.45	0.64(0.48–0.84)	0.001	−0.31	0.74(0.55–0.98)	0.035

^aEpisodes of self-reported common cold in the previous year
Ordinal logistic regression models were used to analyse the association of cigarette smoking status, frequency of leisure-time exercise and self-reported frequency of common cold
^bAdjusted models control for gender and age
^cAdjusted models control for gender, age, ethnicity, education levels, BMI, frequency of drinking, sleep duration, SRSS, SRH, self-perceived life stress, self-perceived work stress, SAS, SDS, LY, NE and MO
Statistical significance: P < 0.05

ISSN: 1471-2458