Table 2.

Mean serum creatinine and eGFR and percentage coded for CKD over the entire study period among individuals with eGFR < 60 ml/min/1.73 m² by patient characteristic

	Mean Scra (mg/dl)	% with abnormal Scrb	Mean eGFR, (ml/min/1.73 m2)	% coded in 6 months	P*
Overall	1.81	79.8 %	48.8	46.4 %	–
Age
20–64	1.90	85.1 %	48.2	48.4 %	0.23
≥65	1.48	59.2 %	51.3	38.8 %
Gender
Male	2.01	87.3 %	48.3	54.0 %	0.002
Female	1.47	66.7 %	49.7	33.3 %
Race/ethnicity
Black	2.22	93.9 %	47.3	53.0 %	0.20
Other	1.65	74.3 %	49.4	43.9 %

Scr serum creatinine

^aFrom first abnormal creatinine forward

^bLaboratory abnormal thresholds: 1.3 mg/dl for males and 1.1 mg/dl for females

^*P for % coded across subcategory by χ² test