Table 3.

Variables included in the model.

Variable name	Description	Code	Meaning
Gender	Gender	1	Male
		2	Female
Agerange	Age at screening adjudicated—date of birth was used to calculate AGE	1	20-30
		2	31–40
		3	41–50
		4	51–60
		5	61–70
		6	71–80
Race	Race/Hispanic origin	1	Mexican American
		2	Other Hispanic
		3	Non-Hispanic white
		4	Non-Hispanic black
		5	Other race—including multi-racial
BMXBMI	Body mass index (kg/m${}^2$)	1	Underweight = $<18.5$
		2	Normal weight = 18.5–24.9
		3	Overweight = 25–29.9
		4	Obesity = BMI of 30 or greater
Kidney	Ever told you had weak/failing kidneys	1	Yes
		2	No
Smoke	Smoked at least 100 cigarettes in life	1	Yes
		2	No
Diabetes	Doctor told you have diabetes	1	Yes
		2	No
		3	Borderline
Hypclass	Systolic: blood pres (mean) mm Hg	0	Non-hypertensive
		1	Hypertensive