Impact of a long-term tobacco-free policy at a comprehensive cancer center: a series of cross-sectional surveys

BMC Public Health

Table 2 Smoking status prevalence by selected independent variables at baseline, after passage of the 1 ^st and 2 ^nd smoke-free laws

	Baseline 2001-2002-2004		After 1^stlaw 2006-2009		After 2^ndlaw 2012		p for trend
	(n = 580)		(n = 462)		(n = 221)
	%	PR (Ref)	%	PR (95% CI)^a	%	PR (95% CI)^a
Never-smokers	42.9	1	41.6	0.99 (0.82 - 1.20)	49.7	1.28 (1.01 - 1.62)	0.118
Former smokers	24.7	1	27.9	1.18 (0.99 - 1.46)	28.1	0.69 (0.82 - 1.50)	0.232
Current smokers ^b	33.1	1	30.5	0.91 (0.73 - 1.13)	22.2	0.65 (0.47 - 0.89)	0.005
*Smoking prevalence by selected variables*
*Sex*
Men	27.3	1	22.5	0.77 (0.46 - 1.30)	19.2	0.59 (0.28 - 1.22)	0.200
Women	35.1	1	33.0	0.94 (0.74 - 1.21)	23.1	0.65 (0.46 - 0.94)	0.009
*Age group (years)*
< 35	34.2	1	39.2	1.18 (0.87 - 1.58)	35.3	1.01 (0.64 - 1.59)	0.507
≥ 35	31.9	1	23.3	0.65 (0.47 - 0.91)	16.3	0.42 (0.27 - 0.67)	0.000
*Professional group*
Doctors	22.1	1	17.3	0.72 (0.37 - 1.41)	15.0	0.20 (0.05 - 0.87)	0.018
Nurses	31.5	1	31.7	1.08 (0.77 - 1.52)	24.7	0.82 (0.49-1.38)	0.357
Administrative staff	41.3	1	27.3	0.61 (0.34 - 1.08)	33.3	0.78 (0.42 - 1.46)	0.222
Others	39.5	1	38.8	0.95 (0.66 - 1.47)	22.4	0.54 (0.29 - 1.01)	0.050

^aAdjusted for sex, age, and profession when necessary.
^bIncludes daily and occasionally smokers.
PR: prevalence ratio obtained from a log-binomial regression model adjusted for sex, age group, and profession group when necessary.

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