Trends in influenza vaccination uptake among people aged over 74 years, 1997–2000: Survey of 73 general practices in Britain

Table 3 Characteristics of sample for whom vaccination data available, by year: practices with individual socioeconomic information

	1997 n = 8334 37 practices¹		1998 n = 7944 38 practices²		1999 n = 7294 38 practices		2000 n = 6159 34 practices³		In all years n = 5130 29 practices
	No	%	No	%	No	%	No	%	No	%
Male	3170	38.0	3026	38.1	2753	37.7	5498	34.7	1938	37.8
< 80 yrs	1378	16.5	1116	14.0	735	10.0	815	5.1	948	18.5
80–84 yrs	1105	13.3	1135	14.3	1184	16.2	2857	18.0	677	13.2
>= 85 yrs	687	8.2	775	9.8	834	11.4	5498	11.5	313	6.1
Median age		(80)		(81)		(82)		(82)		(80)
Female	5164	62.0	4918	61.9	4541	62.3	1035	65.3	3192	62.2
<80 yrs	1873	22.5	1509	19.0	1030	14.2	6	7.9	1354	26.4
80–84 yrs	1775	21.3	1760	22.2	1794	24.6	1259	29.7	1109	21.6
>=85 yrs	1516	18.2	1649	20.8	1717	23.5	4711	27.7	729	14.2
Median age		(81)		(82)		(83)		(83)		(81)
Deprivation quintile ⁴
Least deprived	2247	27.0	2206	27.8	2060	28.2	1811	29.4	1429	27.9
2^nd quintile	2412	28.9	2269	28.6	2076	28.5	1768	28.7	1468	28.6
3^rd quintile	1831	22.0	1767	22.2	1620	22.2	1380	22.4	1155	22.5
4^th quintile	1203	14.4	1128	14.2	1025	14.1	790	12.8	708	13.8
Most deprived	641	7.7	574	7.2	513	7.0	410	6.7	370	7.2
Population density ⁵
<250 pers km^-2	2578	30.9	2363	29.8	2164	29.7	1944	31.6	1778	34.7
250–1000 pers km^-2	2168	26.0	2071	26.1	1905	26.1	1610	26.1	1240	24.2
1000–2500 pers km^-2	2382	28.6	2250	28.3	2085	28.6	1591	25.8	1259	24.5
>=2500 pers km^-2	1206	14.5	1260	15.9	1140	15.6	1014	16.5	853	16.6
Socioeconomic status ⁶
Owner & c heating	4896	58.8	4737	59.6	4440	60.9	3893	63.2	3225	62.9
without c heating	784	9.4	738	9.3	675	9.2	575	9.3	484	9.4
Renter & c heating	1648	19.8	1557	19.6	1378	18.9	1104	17.9	908	17.7
without c heating	356	4.3	322	4.1	287	3.9	197	3.2	181	3.5
Supported housing	650	7.8	590	7.4	514	7.1	390	6.3	332	6.5

1. 29 practices in all years plus 8 practices in years 1997–1999 2. 29 practices in all years plus 8 practices in years 1997–1999 plus 1 practice in 1998–2000 3. 29 practices in all years plus 4 practices in 2000 only plus 1 practice in 1998–2000 4. Quintiles defined according to distribution of Enumeration Districts in Britain 5. Population density smoothed over a 5-kilometre radius from the centroid of the Enumeration District 6. C heating = central heating. Supported accommodation includes sheltered housing and residential homes

ISSN: 2731-4553