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Table 2 Characteristics of sample for whom vaccination data available, by year: all practices

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

 

1997 n = 18162 63 practices1

1998 n = 17962 66 practices2

1999 n = 16254 66 practices

2000 n = 13762 62 practices3

In all years n = 10951 53 practices Age in 1997

 

No

%

No

%

No

%

No

%

No

%

Male

6457

35.6

6339

35.3

5687

35.0

4797

34.8

3778

34.5

< 80 yrs

2773

15.3

2376

13.2

1612

9.9

672

5.1

1873

17.1

80–84 yrs

2231

12.3

2349

13.1

2377

14.6

2535

18.0

1298

11.9

>= 85 yrs

1453

8.0

1614

9.0

1698

10.4

1588

11.5

607

5.5

Median age

 

(80)

 

(81)

 

(82)

 

(82)

 

(80)

Female

14551

64.4

11623

64.7

10567

65.0

8967

65.2

7173

65.5

<80 yrs

4139

22.8

3503

19.5

2387

14.7

1015

7.4

2954

27.0

80–84 yrs

4041

22.2

4156

23.1

4089

25.2

4106

29.8

2517

23.0

>=85 yrs

3525

19.4

3964

22.1

4091

25.2

3846

28.0

1702

15.5

Median age

 

(82)

 

(82)

 

(83)

 

(84)

 

(81)

Deprivation quintile 4

          

Least deprived

4567

25.2

4689

26.1

4287

26.4

3419

24.8

2587

23.6

2nd quintile

5479

30.2

5420

30.2

4933

30.4

3963

28.8

3290

30.0

3rd quintile

3822

21.0

3694

20.6

3336

20.5

3037

22.1

2399

21.9

4th quintile

2444

13.5

2432

13.5

2182

13.4

2000

14.5

1518

13.9

Most deprived

1850

10.2

1727

9.6

1516

9.3

1343

9.8

1157

10.6

Population density 5

          

<250 pers km-2

6156

33.9

6116

34.0

5539

34.1

4509

32.8

3931

35.9

250–1000 pers km-2

4472

24.6

4336

24.1

3913

24.1

3652

26.5

2691

24.5

1000–2500 pers km-2

5074

27.9

4966

27.6

4511

27.8

3549

25.8

2602

23.8

>=2500 pers km-2

2460

13.5

2544

14.2

2291

14.1

2052

14.9

1727

15.8

  1. 1. 53 practices in all years plus 10 practices in years 1997–1999 2. 53 practices in all years plus 11 practices in years 1997–1999 plus 2 practices in 1998–2000 3. 53 practices in all years plus 7 practices in 2000 only plus 2 practices 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