TABLE 1—

Factors Associated With Cigarettes as the Heat Source of Unintentional Residential Fires: Massachusetts: 2004–2010

Covariate	Noncigarette-Caused Fires, No.	Cigarette-Caused Fires, No. (%)	Unadjusted OR (95% CI)	P
FSCL
Post-FSCL	6434	657 (9.3)	1.00 (0.90, 1.11)	> .999
Pre-FSCL	9431	963 (9.3)
Area of origin
Living area	10 382	1253 (10.8)	1.74 (1.54, 1.96)	< .001
Non–living area (Ref)	5326	365 (6.4)	1.00
Undetermined	157	2 (1.3)	0.18 (0.45, 0.75)	.018
Substrate
Furniture, bedding, or soft goods	7713	956 (11.0)	1.44 (1.29, 1.61)	< .001
Undetermined	1302	76 (5.5)	0.68 (0.52, 0.87)	.002
Other (Ref)	6850	588 (7.9)	1.00
Human factors
Yes	2376	485 (17.0)	2.37 (2.11, 2.66)	< .001
No	13 156	1135 (7.9)
Day of wk
Weekend	5725	603 (9.5)	1.05 (0.94, 1.17)	.365
Weekday	10 140	1017 (9.1)
Time of d
Night	9102	854 (8.6)	0.83 (0.75, 0.92)	< .001
Day	6763	766 (10.2)
Season
Winter	4660	358 (7.1)	0.81 (0.69, 0.94)	.006
Spring	4003	564 (12.4)	1.47 (1.27, 1.69)	< .001
Summer	3613	356 (9.0)	1.03 (0.88, 1.20)	.725
Fall (Ref)	3589	342 (8.7)	1.00

Note. CI = confidence interval; FSCL = Fire Safe Cigarette Law; OR = odds ratio.