Table 4.

Percentage of Caregivers Reporting “Yes” to Having Undertaken Certain Behavior

	Intervention (%)		Control (%)
Behavior	Pre n = 150	Post n = 115	Pre n = 148	Post n = 112	Intervention Effecta (ORint/ORcon)	p Value
Vacuum cleaner used for cleaning	61	97	59	59	29.5 (6.90, 126)	< .0001
Dusted room where child sleeps during the last 2 weeks?	78	89	79	80	2.35 (0.94, 5.86)	.07
Sheets changed at least once/week	69	88	74	70	3.88 (1.53, 9.83)	.004
Bedcovers washed at least once per month	90	96	86	93	1.18 (0.29, 4.81)	.82
Allergen cover on child’s pillow	3	47	5	7	19.7 (4.12, 94.2)	.0006
Allergen cover on child’s mattress	19	65	20	17	9.70 (4.33, 21.7)	< .0001
Visible mold growth removed?	21	22	22	27	0.74 (0.33, 1.66)	.47
Caregiver smokes cigarettes	40	33	36	34	0.75 (0.43, 1.31)	.32
Any household member smokes cigarettes	57	56	54	59	0.73 (0.42, 1.27)	.27
Child is around people who smoke	76	61	75	69	0.60 (0.28, 1.32)	.20

^aOR_int is the odds ratio for change in the intervention group from pre to post Year 1 of the intervention. OR_con is the same for the control group. The measure of the effectiveness of the intervention, controlling for the changes seen in the control group over time, is the ratio of these odds ratios (OR_int/OR_con). An example of interpretation for the symptom “vacuum cleaner use” is that the odds ratio for improvement in the intervention group is 29.5 times that for the control group, and this is statistically significantly different from 1.0 at the alpha =.05 level (p < .05).