Table 3.

Odd ratios of hand hygiene compliance by night versus morning shift and by observed units.

Unit	Morning shift compliance		Night shift compliancea		Odds ratio	95% CI	P value
	Yes	No	Yes	No
A	40	11	14	6	1.56	0.48-5.0	.45
B	29	2	11	4	5.27	0.84-32.9	.07
C	52	17	11	4	1.11	0.31-3.95	.86
D	21	11	16	5	0.59	0.17-2.06	.41
E	16	1	13	3	3.69	0.34-39.83	.28
F	26	3	15	3	1.73	0.31-9.69	.53
G	16	10	12	7	0.93	0.27-3.16	.91
H	18	4	13	7	2.42	0.58-10.03	.22
All units	218	59	105	39	1.37	0.86-2.18	.18

^aNight shifts were considered adverse exposure and we assumed compliance would be lower during night hours.