Table 1

COHb levels in older men: relations to region, social class, employment status, housing tenure

Model 1

Model 2


current smoking

COHb

COHb


N

%

Geometric mean

95%

CI

p

Geometric mean

95%

CI

p


    Region of current residence

<0.0001

<0.0001

South

1155

16.5

0.35

0.33

0.38

0.37

0.35

0.39

Midland+Wales

578

18.9

0.52

0.47

0.56

0.51

0.47

0.55

North

1478

20.0

0.53

0.50

0.57

0.52

0.49

0.54

Scotland

392

19.5

0.49

0.44

0.55

0.47

0.42

0.51

    Social Class

<0.0001

0.0344

I

274

9.9

0.37

0.32

0.42

0.46

0.42

0.51

II

882

14.9

0.44

0.41

0.47

0.48

0.46

0.51

IIIN

472

16.5

0.44

0.40

0.48

0.46

0.42

0.49

IIIM

1197

20.6

0.47

0.44

0.50

0.44

0.42

0.49

IV

475

25.3

0.56

0.51

0.62

0.48

0.44

0.51

V

130

23.4

0.49

0.41

0.59

0.40

0.34

0.46

    Employment

0.0178

0.8007

Unemployed

77

29.0

0.64

0.50

0.83

0.46

0.37

0.56

employed – (full or part time)

613

19.3

0.44

0.40

0.49

0.47

0.43

0.50

Retired

2834

18.2

0.46

0.44

0.48

0.45

0.43

0.47

    Housing tenure

0.0001

0.6273

owner occupier

3041

16.3

0.43

0.42

0.45

0.45

0.44

0.47

renting from local authority

342

33.4

0.68

0.60

0.76

0.47

0.43

0.52

renting privately

85

35.3

0.70

0.55

0.88

0.50

0.42

0.60

Other

33

24.2

0.50

0.35

0.73

0.47

0.35

0.64


Social class: (non manual) I professional, II intermediate, IIIN skilled non-manual, (manual) IIIM skilled manual, IV semi skilled manual, V unskilled manual

Model 1: Includes the relevant factor with adjustment for age, time of day, season.

Model 2: Includes the relevant factor with adjustment for age, time of day, season, and other factors which were statistically significant in the univariate analyses

(region, social class, employment status, housing tenure, active smoking, passive smoking, gas cooking, central heating). An interaction term for active smoking*time of day is also included in the model (see text).

p values presented refer to the results of statistical tests of heterogeneity in COHb levels between the explanatory variable categories

Whincup et al. BMC Public Health 2006 6:189   doi:10.1186/1471-2458-6-189

Open Data