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Twenty-four-hour urinary creatinine (Cr) excretion and Cr clearance (CrCl): mean (upper limit 95% confidence interval)
| Age | Male | Female | p value |
|---|---|---|---|
| Cr mg/1.73 m2 | |||
| 6–10 | 929 (993) | 762 (847) | <0.01 |
| 11–14 | 1,272 (1,364) | 1,050 (1,168) | <0.01 |
| ≥15 | 1,514 (1,667)* | 1,122 (1,236)* | <0.01 |
| CrCl ml/min/1.73 m2 | |||
| 6–10 | 121 (131) | 110 (126) | NS |
| 11–14 | 130 (138) | 106 (119) | <0.01 |
| ≥15 | 117 (130) | 106 (115) | NS |
NS not significant
p<0.05 for gender-specific difference between three age groups
