Reliability of Family Proxy Data for Studies of Malignant Mesothelioma: Results from the ATSDR Pilot Surveillance

Table 3

McNemar/Durkalski statistics for paired responses, by type of relationship and type of question.

Question set	Proxy type	Paired responses						McNemar/Durkalski Test
		Agreed		Disagreed		Missing/unknown*
		#	%	#	%	#	%	Chi-square	𝑃 value
	Spouse	229	89.8	24	9.4	2	0.8	1.48	0.22
Respondent exposure	Child	76	84.4	14	15.6	0	0.0	1.87	0.17
(15 questions)	Sibling	64	85.3	9	12.0	2	2.7	0	1
	Other/parent	62	82.7	13	17.3	0	0.0	0.14	0.71
	Total	431	87.1	60	12.1	4	0.8	0.15	0.70
	Spouse	384	94.1	24	5.9	0	0.0	1.14	0.29
Respondent medical	Child	119	82.6	7	4.9	18	12.5	2	0.16
(24 questions)	Sibling	98	81.7	10	8.3	12	10.0	1.92	0.17
	Other/parent	103	85.8	17	14.2	0	0.0	3	0.08
	Total	704	88.9	58	7.3	30	3.8	2.53	0.11
	Spouse	213	89.5	25	10.5	0	0.0	1.37	0.24
Family exposure	Child	71	84.5	13	15.5	0	0.0	0.02	0.88
(14 questions)	Sibling	58	82.9	12	17.1	0	0.0	3	0.08
	Other/parent	67	95.7	3	4.3	0	0.0	1	0.32
	Total	409	88.5	53	11.5	0	0.00	1.30	0.25
	Spouse	199	90.0	22	10.0	0	0.0	0.02	0.89
Family medical	Child	64	82.1	8	10.3	6	7.7	1.29	0.24
(13 questions)	Sibling	47	72.3	6	9.2	12	18.5	0.67	0.41
	Other/parent	56	86.2	9	13.8	0	0.0	3	0.08
	Total	366	85.3	45	10.5	18	4.2	0.95	0.33
	Spouse	102	85.7	16	13.4	1	0.8	5.91	0.02
Smoking	Child	38	90.5	4	9.5	0	0.0	1.8	0.18
(7 questions)	Sibling	30	85.7	5	14.3	0	0.0	0.67	0.41
	Other/parent	30	85.7	5	14.3	0	0.0	3.57	0.06
	Total	200	86.6	30	13.0	1	0.4	5.57	0.02

∗Missing or unknown answers were excluded from the McNemar/Durkalski statistic calculation.