Table 1.

Demographic characteristics of CKDu cases in the endemic area, controls from the endemic area and controls from the non-endemic area

Characteristic	Endemic area		Non-endemic area
	CKDu cases	Controls	Controls
Total number	733	4044	250
Males, %	37.1	42.5	56
Age (years), mean (SD)	39.1 (14.2)	43.7 (13.9)	35.5 (14.0)
Farmer, %	38	43.9	18.3
BMI, kg/m2, mean (SD)	22.3 (4.6)	21.1 (4.1)	21.7 (4.4)
ACR ≥30 mg/g	733	0	0

ACR albumin–creatinine ratio, BMI body mass index, SD standard deviation.