Table 1a. Composition of BMI, waist circumference and WHR data.

	Derived BMI data	Available waist circumference data	Derived WHR data
Controls	4769	5020	4917
Cases stage and grade
Stage
Localised cases	919	970	957
Advanced cases	100	111	110
Unstaged cases	6	8	8
Grade
Low	691	736	723
Intermediate	272	288	287
High	57	59	59
Ungraded cases	5	6	6
Subjects with complete data on each of BMI, waist circumference, WHR and factors (age, family history) in final stage and grade analyses
	BMI + factors	Waist circumference + factors	WHR + factors
Controls	4368	4583	4490
Cases stage and grade
Stage
Localised cases	843	882	870
Advanced cases	86	88	88
Grade
Low	632	665	654
Intermediate	242	248	247
High	55	57	57

Abbreviations: BMI=body mass index; WHR=waist-to-hip ratio.

The derived metric is defined as the measured value if available and the self-reported value otherwise. BMI was derived from weight and height measurements as kg m⁻²; WHR was computed as waist circumference divided by hip circumference.