The effect of mode and context on survey results: Analysis of data from the Health Survey for England 2006 and the Boost Survey for London

Table 1 Results not affected by survey mode

	WOMEN		MEN
	Core	Boost	Core	Boost
	%	%	%	%
Longstanding illness (%)
None	69	67	72	70
Non-limiting	13	11	11	12
Limiting	19	21	17	19
p		0.23		0.53
N	833	2676	736	2174
Smoking status (%)
Current smoker	19	19	25	25
Ex-smoker	23	22	28	25
Never smoked	58	60	47	50
p		0.57		0.28
N	827	2680	728	2142
No. of smokers in household
None	76	77	76	76
One	16	15	16	16
Two	7	8	8	9
p		0.75		0.93
N	833	2736	783	2206
Frequency of alcohol use in past 12 months
Almost every day	9	6	15	14
5-6 d pw	4	4	8	7
3-4 d pw	11	13	16	16
Once or twice a week	21	22	27	25
Once or twice a month	12	12	10	11
Once every couple of months	9	9	3	6
Once or twice a year	8	10	5	5
Not at all/non-drinker	26	24	16	16
p		0.19		0.43
N	731	2297	644	1918
Whether drank in the last 7 days ^a
Yes	68	66	80	78
No	32	34	20	22
p		0.33		0.29
N	535	1814	539	1635