Reliability and validity of the Healthy Home Survey: A tool to measure factors within homes hypothesized to relate to overweight in children

Table 5 Reliability and validity estimates for physical activity and media environment items from the HHS

	Reliability						Validity
	n	% Agree	Kappa (95% CI)	PABAK¹	Ppos	Pneg	n	% Agree	Kappa (95% CI)	PABAK¹	SEN	SPEC
Physical activity environment
Outdoor recreation facilities	45	91.1	0.66 (0.36–0.97)		0.95	0.71
Indoor recreation centers	45	95.6	0.88 (0.72–1.00)		0.91	0.97
Parent exercise (past month)	45	95.6	0.73 (0.36–1.00)		0.98	0.75
Yard	45	100.0	1.00	1.00	1.00	1.00	79	98.7	0.85 (0.56–1.00)	0.98	1.00	0.75
Yard Size	43	83.7	0.73 (0.54–0.92)^w				75	66.7	0.49 (0.31–0.66)^w
Share Yard	43	97.7	0.85 (0.55–1.00)	0.95	0.86	0.99	75	96.0	0.71 (0.40–1.00)	0.92	1.00	0.96
Play equipment in Yard	43	95.4	0.90 (0.78–1.00)		0.94	0.96	74	90.5	0.81 (0.67–0.94)		0.98	0.82
Bike or riding toy	45	91.1	0.29 (-0.21–0.79)	0.82	0.95	0.33	78	96.2	-0.02 (-0.04–0.01)	0.92	0.99	0.00
Adequate Play Space Inside	45	77.8	0.69 (0.50–0.89)^w				79	43.0	0.06 (-0.11–0.22)^w
Media environment
Number of TVs	45	100.0	1.00^w				78	84.6	0.88 (0.82–0.95)^w
Number of DVD players	45	75.6	0.77 (0.64–0.90)^w				79	59.5	0.56 (0.43–0.70)^w
Number of computers	45	93.3	0.92 (0.84–1.00)^w				79	64.6	0.58 (0.45–0.72)^w
Number of video games consoles	45	88.9	0.84 (0.73–0.95)^w				79	73.4	0.64 (0.55–0.74)^w
Number of DVDs	44	75.0	0.56 (0.33–0.80)^w				79	64.6	0.60 (0.46–0.75)^w
Cable TV	45	100.0	1.00		1.00	1.00	79	98.7	0.96 (0.89–1.00)		1.00	0.94
TV in child's bedroom	45	100.0	1.00		1.00	1.00	79	96.2	0.88 (0.75–1.00)		0.88	0.99
Computer in child's bedroom	45	100.0	1.00	1.00	1.00	1.00	79	92.4	0.53 (0.21–0.86)	0.85	0.44	0.99
Video game in child's bedroom	42	97.6	0.84 (0.55–1.00)	0.95	0.86	0.99	76	94.7	0.72 (0.47–0.98)	0.90	0.60	1.00

^wWeighted Kappa (for items with ≥3 response categories); ¹ Adjusted Kappa (PABAK) used if prevalence ≥85%; Ppos = proportion of positive agreement; Pneg = proportion of negative agreement; SEN = sensitivity (proportion of those reporting YES confirmed as YES by the home visit); SPE = specificity (proportion of those reporting NO confirmed as NO by the home visit); CI = confidence interval

ISSN: 1479-5868