Table 1.

Subject characteristics for the two periods of assessment, 1993–7 and 2004–8

	1993-7	2004-8
	n = 1,494	n = 1,076
Age (years); median (interquartile range)	54.2 (37.4-71.6)	51.1 (34.7-65.9)
BMI categories*; n (%)
morbid (class III) obesity	34 (2.3%)	44 (4.1%)
class II obesity	75 (5.0%)	81 (7.5%)
class I obesity	227 (15.2%)	191 (17.8%)
overweight	494 (33.1%)	333 (31.0%)
normal weight	635 (42.5%)	412 (38.3%)
underweight	29 (1.9%)	15 (1.4%)

*BMI (kg/m²) for morbid (class III) obesity ≥40.0, class II obesity 35.0-39.9, class I obesity 30.0-34.9, overweight 25.0-29.9, normal weight 18.5-24.9, underweight <18.5.