Table 1.

Distribution of questionnaire data and biological samples in cases and controls from EAGLE

	Cases No. 2101		Controls No. 2120
	No.	%	No.	%
With data on major risk factors	2067	98.4	2116	99.8
With data on diet and behavioural factors	1903	90.6	2073	97.8
With at least one DNA sample*	2045	97.3	2117	99.9
With blood sample	1891	90.0	1841	86.8
With buccal rinse sample	154	7.3	282	13.3
With at least one pathology sample	1212	57.7
With tissue slides	1192	56.7
With paraffin-embedded tissue blocks	656	31.2
With fresh tissue samples	436	20.8

*Two cases and six controls donated both blood and buccal samples