Table 2

Predictors of lung function in the fully adjusted regression model

	β	p	∆R²
Step 1
Height in metres	0.40	<0.001
Weight in kilograms	−0.03	0.035
Age at medical examination in years	−0.15	<0.001
Units of alcohol per week	−0.03	0.015
Ethnicity	−0.09	<0.001
Place of service	−0.02	0.123
Smoking status	−0.17	<0.001
Education grade	−0.02	0.248
Household income midlife	0.02	0.325
Marital status	0.01	0.430
Physician-diagnosed chronic disease	−0.05	<0.001	0.238
Step 2
Standardised IQ score from enlistment	0.12	<0.001	0.008