Table 1 Sociodemographic and clinical characteristics of the study participants.

From: Urinary biomarkers indicate pediatric renal injury among rural farming communities in Sri Lanka

Criterion

Endemic (N = 327)

Emerging (N = 313)

Non-endemic (N = 164)

Boys

Girls

Boys

Girls

Boys

Girls

No. of children

150

177

140

173

86

78

Age (years)

Median (IQR)

14.4

(13.6–15.1)

14.6

(13.9–15.5)

14.6

(13.9–15.3)

14.4

(13.6–15.2)

13.6

(12.7–14.7)

13.8

12.6–15.0)

BMI (kg/m2)

Median (IQR)

17.8

(15.6–19.9)

18.3

(17.0–20.4)

16.8

(15.3–19.1)

17.5

(15.4–20.2)

16.9

(15.3–19.1)

19.1

(16.5–22.9)

Renal disorders

Renal stones

2 (0.6%)

0

1 (0.3%)

0

4 (2.4%)

0

Pain when urinating

0

0

1 (0.3%)

0

4 (2.4%)

1 (0.6%)

infections

0

0

0

0

0

1 (0.6%)

Other diseases

Asthma

0

0

0

0

5 (3.0%)

2 (1.2%)

Dental fluorosis

4 (1.2%)

3 (0.9%)

0

0

0

0

Family history CKD/CKDu

46

(14.1%)

37

(11.3%)

0

7

(2.2%)

2

(1.2%)

6

(3.7%)

Parents’ occupation as farmers

120 (36.7%)

135 (41.3%)

57

(18.2%)

70

(22.4%)

12‡ ⁑

(7.3%)

11‡ ⁑

(6.7%)

  1. The occurrence of renal disorders, other diseases, family history of chronic kidney disease of uncertain etiology (CKDu) and parents’ involvement in farming is given as the number of children and as a percentage of the total size of respective group. Statistical significance between proportions is expressed for boys and girls in CKDu emerging and non-endemic areas compared to their counterparts from other groups according to Chi-squared test; denotes comparison with endemic group (p < 0.05) and denotes comparison with emerging group (p < 0.05). BMI- body mass index, and IQR- inter quartile range. Age is given to the date of sample collection.