BMC Medical Research Methodology

Table 4 Demographic representativeness of respondents by survey mode, survey of Utah cancer survivors¹

From: The feasibility of web surveys for obtaining patient-reported outcomes from cancer survivors: a randomized experiment comparing survey modes and brochure enclosures

	Full sample		Paper					Web
			Respondents		Adj. RR²	95% CI	P	Respondents		Adj. RR²	95% CI	P
	n	Col.%	n	Col.%	Adj. RR²	95% CI	P	n	Col.%	Adj. RR²	95% CI	P
Time since diagnosis
Long-term	192	43.0	43	37.7	1.00	Ref.		35	36.8	1.00	Ref.
Short-term	254	57.0	71	62.3	1.36	1.01, 1.84	0.043	60	63.2	1.07	0.74, 1.54	0.719
Sex
Female	252	56.5	74	64.9	1.39	0.91, 2.12	0.127	52	54.7	0.75	0.46, 1.22	0.249
Male	194	43.5	40	35.1	1.00	Ref.		43	45.3	1.00	Ref.
Current age
< 40	74	16.6	14	12.3	1.00	Ref.		13	13.7	1.00	Ref.
40–49	126	28.3	34	29.8	1.34	0.83, 2.16	0.238	30	31.6	1.49	0.86, 2.59	0.157
50–59	171	38.3	40	35.1	1.67	0.99, 2.80	0.053	34	35.8	1.06	0.59, 1.89	0.856
> =60	75	16.8	26	22.8	1.78	1.02, 3.06	0.043	18	19.0	1.56	0.80, 3.06	0.196
Race
White	416	93.3	108	94.7	1.00	Ref.		92	96.8	1.00	Ref.
Nonwhite	30	6.7	6	5.3	0.76	0.41, 1.41	0.379	< 5³	–	0.45	0.16, 1.29	0.138
Ethnicity
Hispanic	68	15.5	15	13.4	0.90	0.60, 1.35	0.611	8	8.5	0.51	0.27, 0.96	0.036
Non-Hispanic	372	84.6	97	86.6	1.00	Ref.		86	91.5	1.00	Ref.
Geography
Rural	61	13.7	19	16.7	0.84	0.57, 1.21	0.347	10	10.5	0.91	0.55, 1.51	0.728
Metropolitan	385	86.3	95	83.3	1.00	Ref.		85	89.5	1.00	Ref.
Cancer site
Colorectal	128	28.7	26	22.8	1.00	Ref.		25	26.3	1.00	Ref.
Myeloma	64	14.4	20	17.5	1.45	0.77, 2.73	0.256	13	13.7	0.78	0.40, 1.54	0.480
Breast	97	21.8	27	23.7	0.92	0.57, 1.50	0.745	19	20.0	1.18	0.63, 2.21	0.597
Ovarian	63	14.1	21	18.4	1.26	0.79, 2.03	0.334	16	16.8	1.51	0.85, 2.68	0.157
Prostate	94	21.1	20	17.5	0.89	0.51, 1.56	0.687	22	23.2	1.22	0.72, 2.04	0.459
Stage
In situ	24	5.4	7	6.1	1.00	Ref.		7	7.4	1.00	Ref.
Localized	211	47.3	54	47.4	0.76	0.44, 1.30	0.313	39	41.1	0.74	0.37, 1.46	0.383
Regional	114	25.6	23	20.2	0.60	0.34, 1.07	0.086	26	27.4	0.86	0.43, 1.71	0.667
Distant	97	21.8	30	26.3	0.59	0.28, 1.21	0.149	23	24.2	1.11	0.52, 2.39	0.786

1. P-values for statistically significant comparisons are presented in boldface
2. Adjusted (Adj.) risk ratios from a multivariable model that adjusts for other variables in table
3. Cell counts less than five are masked for protection of confidentiality

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