Table 1

Descriptive information for the main outcome and explanatory variables, Twenty-07 Study, Waves 1 - 5 (1987/8 - 2007/8)

Characteristics

Baseline

Wave2

Wave3

Wave4

Wave5

Modeling Data- Waves 2-5^a

Modeling data- with dead respondents- Waves 2-5^a

1987/8

1990/2

1995/7

2000/4

2007/8

1970s Cohort

% of whole sample in cohort at each wave

33.6

35.0

30.8

31.7

36.2

33.3

30.2

Number in cohort at each wave

1515

1343

916

843

942

3982

4033

Average Age

15.7

18.6

24.8

30.2

36.7

26.7

26.7

% of cohort female

51.3

52.4

54.1

54.4

54.9

53.7

53.4

% of cohort in poor health at baseline^b

-

-

-

-

-

-

-

% of cohort in poor health status at each wave

-

33.6

30.5

32.5

22.9

30.1

31.0

% of cohort in manual class at baseline

39.5

37.1

34.5

33.7

34.7

35.6

35.9

% of cohort in manual class at each wave

39.5

37.5

32.1

20.4

17.1

32.5^c

32.8^c

% of cohort dead (of baseline sample)

0

0.1

0.5

1.1

1.7

N/a

1.3^d

1950s Cohort

% of whole sample in cohort at each wave

32.0

32.0

34.5

36.8

38.4

35.0

32.6

Number in cohort at each wave

1444

1225

1026

980

999

4180

4354

Average Age

36.2

40.5

45.2

50.2

57.1

47.8

48.0

% of cohort female

54.6

55.2

55.6

54.5

54.3

55.1

54.6

% of cohort in poor health at baseline

23.8

23.8

21.9

21.6

21.8

22.3

22.9

% of cohort in poor health status at each wave

23.8

28.8

31.2

33.1

29.5

30.5

33.3

% of cohort in manual class at baseline

34.2

33.5

31.1

29.8

30.4

31.6

32.3

% of cohort in manual class at each wave

34.2

30.5

27.7

26.9

26.3

28.9^c

29.6^c

% of cohort dead (of baseline sample)

0

0.6

2.1

3.9

6.0

N/a

4.0^d

1930s Cohort

% of whole sample in cohort at each wave

34.4

33.0

34.7

31.5

25.5

31.7

37.2

Number in cohort at each wave

1551

1266

1030

838

663

3789

4972

Average Age

56.2

59.6

64.4

69.1

76.2

65.9

67.1

% of cohort female

54.7

54.2

56.3

56.1

57.9

55.9

53.2

% of cohort in poor health at baseline

41.9

41.9

39.6

36.0

33.8

38.6

42.7

% of cohort in poor health status at each wave

41.9

39.5

44.3

40.1

46.2

42.2

55.9

% of cohort in manual class at baseline

45.8

43.4

39.9

37.0

34.2

39.5

43.5

% of cohort in manual class at each wave

45.8

45.8

43.3

42.4

41.2

42.1^c

45.8^c

% of cohort dead (of baseline sample)

0

4.8

11.7

23.1

36.6

N/a

23.8^d

All cohorts

Total (N)

4510

3834

2972

2661

2604

11951

13359

Average Age

36.2

39.2

45.6

49.8

54.6

46.5

48.7

% female

53.5

53.9

55.4

55.0

55.4

54.9

53.7

% poor health at baseline^e

33.2

33.0

30.8

28.3

26.6

30.1

33.4

% poor health status at each wave

33.2^e

34.0

35.5

35.1

31.4

34.1

41.0

% in manual class at baseline

40.0

38.0

35.2

33.3

32.9

35.4

37.5

% in manual class at each wave

40.0

38.0

34.5

29.7

26.8

34.3^c

36.6^c

% dead (of baseline sample)

0

1.9

4.9

9.6

15.1

N/a

10.5^d

^aData in these columns are person-waves.

^bThe self-assessed health question used in this analysis was not included in the baseline interview for the 1970s cohort

^cHousehold class from the previous (or most recent) wave is used for the person-wave data as this is what was used in the statistical models.

^dThis value represent the percentage of person-waves where the respondent is actually dead.

^eThe self-assessed health question used in this analysis was not included in the baseline interview for the 1970s cohort, and so these figures give combined percentages for the 1950s and 1930s cohorts only.

Benzeval et al. BMC Public Health 2011 11:947   doi:10.1186/1471-2458-11-947