TABLE 2—

Unadjusted and Adjusted Odds Ratios Comparing Suffocation and Undetermined Cause Deaths With SIDS Deaths, by Child and Incident Characteristics: 9 US States, 2005–2008

	Suffocation vs SIDS, OR (95% CI)	Suffocation vs SIDS,a AOR (95% CI)	Undetermined Cause vs SIDS, OR (95% CI)	Undetermined Cause vs SIDS,b AOR (95% CI)
Child characteristic
Age at death, mo
< 2 (Ref)	1.0	1.0	1.0	1.0
2–3	0.6 (0.5, 0.8)	0.7 (0.6, 1.0)	0.7 (0.6, 0.8)	0.8 (0.6, 1.0)
4–5	0.6 (0.5, 0.8)	0.9 (0.6, 1.2)	0.7 (0.5, 0.9)	0.9 (0.7, 1.2)
6–7	0.8 (0.5, 1.2)	1.2 (0.8, 1.9)	0.7 (0.5, 1.0)	0.9 (0.6, 1.3)
≥ 8	1.7 (1.0, 2.9)	2.6 (1.5, 4.7)	1.1 (0.6, 1.8)	1.4 (0.8, 2.3)
Race/ethnicity
White, non-Hispanic (Ref)	1.0	1.0	1.0	1.0
Black, non-Hispanic	1.3 (0.9, 1.7)	1.2 (0.8, 1.7)	1.9 (1.4, 2.4)	1.9 (1.4, 2.5)
Hispanic	1.6 (1.3, 2.0)	1.2 (0.9, 1.6)	2.0 (1.6, 2.5)	1.8 (1.4, 2.3)
Other	0.9 (0.5, 1.4)	0.7 (0.4, 1.3)	0.9 (0.6, 1.5)	1.0 (0.6, 1.6)
Incident characteristic
Infant sleep surface
Crib/bassinette (Ref)	1.0	1.0	1.0	1.0
Adult bed	4.3 (3.3, 5.7)	2.3 (1.6, 3.2)	2.8 (2.2, 3.4)	1.5 (1.2, 2.0)
Couch/chair	6.3 (4.2, 9.4)	2.8 (1.7, 4.8)	2.7 (1.9, 3.8)	1.6 (1.1, 2.4)
Other	2.3 (1.6, 3.4)	1.9 (1.2, 2.8)	1.6 (1.1, 2.2)	1.4 (1.0, 1.9)
Position when found
On back (Ref)	1.0	1.0	1.0	1.0
On stomach	1.7 (1.3, 2.3)	1.8 (1.3, 2.6)	1.0 (0.8, 1.2)	1.1 (0.8, 1.4)
On side	1.9 (1.3, 3.0)	1.7 (1.0, 2.8)	1.4 (1.0, 1.9)	1.3 (0.9, 1.8)
Unknown	1.9 (1.4, 2.6)	1.3 (0.9, 1.9)	0.9 (0.7, 1.2)	0.8 (0.6, 1.1)
Airway condition
Unobstructed (Ref)	1.0	1.0	1.0	1.0
Partially obstructed	3.3 (2.0, 5.4)	3.1 (1.8, 5.4)	2.1 (1.3, 3.3)	1.8 (1.1, 2.9)
Fully obstructed	6.9 (4.7, 10.0)	4.8 (3.3, 7.0)	1.8 (1.3, 3.3)	1.6 (1.1, 2.3)
Unknown	2.1 (1.6, 2.9)	1.7 (1.2, 2.3)	1.2 (0.9, 1.6)	1.2 (0.9, 1.6)
Infant sleeping with person/animal
No (Ref)	1.0	1.0	1.0	1.0
Yes	3.7 (2.3, 5.9)	1.3 (0.7, 2.4)	2.1 (1.5, 3.1)	1.2 (0.8, 1.8)
Infant sleeping with adult
No (Ref)	1.0	1.0	1.0	1.0
Yes	3.7 (3.0, 4.6)	2.7 (2.0, 3.5)	2.9 (2.4, 3.4)	2.2 (1.7, 2.8)

Note. AOR = adjusted odds ratio; CI = confidence interval; OR = odds ratio; SIDS = sudden infant death syndrome. Unadjusted ORs were obtained from individual logistic regression models that contained the variable listed as well as the covariates year of death and state; thus, year of death and state were controlled in each logistic regression model. AORs were obtained from logistic regression models that contained all of the variables listed as well as the covariates year of death and state.

^aArea under the receiver operator curve for this multivariate model: 0.80 (95% CI = 0.78, 0.82).

^bArea under the receiver operator curve for this multivariate model: 0.74 (95% CI = 0.72, 0.76).