TABLE 2.

Sleep Environment Factors for Deaths on Sofas and Other Sleep-Related Infant Deaths

Risk Factor	Total		Deaths on Sofas		Other Deaths		P
	N	%	N	%	N	%
Total	7934	100	1024	100.0	6910	100.0
Surface sharing
No	2316	29.2	111	10.9	2204	31.9	<.001
Yes	5466	68.9	889	86.9	4576	66.2
Unknown	152	1.9	23	2.2	129	1.9
Missing data	1864	23.7
Object
Any	2870	36.2	242	23.6	2628	38.0	<.001
Position child placed to sleep
On back	3232	40.7	307	29.9	2926	42.3	<.001
On stomach	1784	22.5	306	29.9	1478	21.4
On side	1032	13	134	13.1	898	13.0
Unknown	1885	23.8	276	27.0	1609	23.3
Missing data	372	4.7
Position child found in
On back	2185	27.5	205	20.1	1980	28.6	<.001
On stomach	3107	39.2	388	37.9	2718	39.3
On side	973	12.3	174	17.0	799	11.6
Unknown	1669	21	256	25.0	1413	20.4
Change in child’s sleep position
Back or side to back or side	2658	33.5	287	28.1	2370	34.3	<.001
Back or side to stomach	1244	15.7	107	10.4	1137	16.5
Stomach to stomach	1481	18.7	230	22.5	1251	18.1
Stomach to back or side	156	2.0	41	4.0	115	1.7
Either placed or found position unknown	2395	30.2	359	35.0	2037	29.5
Missing data	449	5.7
Change in sleep location
New or different sleep location	1253	15.8	304	29.7	950	13.7	<.0001
Same sleep location	3538	44.6	132	12.9	3406	49.3
Unknown sleep location	3232	39.6	588	57.4	2555	37.0