Table 2.

Participation of Individuals in Case, Population-based Control, and Spouse/Friend Control Families, by Study Center and Degree of Relatedness, Australian Melanoma Family Study, 2001–2005^a

	Brisbane				Sydney				Melbourne				Total
	Case	Population-based Control	Spouse/ Friend Control	Total	Case	Population-based Control	Spouse/ Friend Control	Total	Case	Population-based Control	Spouse/ Friend Control	Total	Case	Population-based Control	Spouse/ Friend Control	Total
Probands
Full questionnaire	234	149	85	468	168	57	66	291	226	33	138	397	628	239	289	1,156
Blood	211	137	75	423	165	54	59	278	221	29	122	372	597	220	256	1,073
Skin examination	129	72	49	250	142	36	38	216	190	24	110	324	461	132	197	790
Child proxy	145	79	39	263	132	26	32	190	185	16	50	251	462	121	121	704
First-degree relative
Full questionnaire	511	294	152	957	434	61	71	566	612	58	150	820	1,557	413	373	2,343
Proxy questionnaire	42	30	34	106	40	7	17	64	53	7	67	127	135	44	118	297
Blood	463	271	149	883	398	63	97	558	548	52	122	722	1,409	386	368	2,163
Skin examination	71	0	0	71	74	2	0	76	103	6	0	109	248	8	0	256
Child proxy	109	0	0	109	103	8	0	111	146	10	0	156	358	18	0	376
Second- or higher-degree relative
Full questionnaire	469	318	0	787	265	17	0	282	436	15	0	451	1,170	350	0	1,520
Proxy questionnaire	634	407	0	1,041	644	171	0	815	1,000	128	0	1,128	2,278	706	0	2,984
Blood	31	13	0	44	21	2	0	23	28	3	0	31	80	18	0	98
Total
Full questionnaire	1,214	761	237	2,212	867	135	137	1,139	1,274	106	288	1,668	3,355	1,002	662	5,019
Proxy questionnaire	676	437	34	1,147	684	178	17	879	1,053	135	67	1,255	2,413	750	118	3,281
Bloodb	705	421	224	1,350	584	119	156	859	797	84	244	1,125	2,086	624	624	3,334
Skin examination	200	72	49	321	216	38	38	292	293	30	110	433	709	140	197	1,046
Child proxy	254	79	39	372	235	34	32	301	331	26	50	407	820	139	121	1,080

^aThe data represent the number in each category.

^bIncludes 28 participants with buccal swabs instead of blood.