Table 1

Characteristics of patient sample

Patients	Consenting N = 230		Non-consenting N = 88

	n	%	n	%
Age, years	χ² = 1.799; df = 3; P = 0.62
18–34	34	14.8	15	17.0
35–54	67	29.1	28	31.8
55–74	78	33.9	23	26.1
≥75	51	22.2	22	25.0

Sex	χ² = 2.32; df = 2; P = 0.13
Male	100	43.5	30	34.1
Female	130	56.5	58	65.9

Ethnicity^{^a}
White	221	96.5	^{^b}
Other	8	3.5	^{^b}

↵a Missing data on ethnicity for one patient.
↵b Not recorded. df = degrees of freedom.