Table 3.

Average predicted age at dialysis initiation from linear regression models by G1 risk allele

	Wt	Heterozygousc	Homozygousc
Age	61.8	55.9	49.0
	—	P = 0.011	P = 2.1 × 10−7
Age + H-ESRD	61.8	55.9	49.1
	—	P = 0.011	P = 1.7 × 10−7
Age + H-ESRD + male gender	61.8	55.9	49.1
	—	P = 0.012	P = 1.7 × 10−7
Age + H-ESRD + male gender + tertile 3 incomea + tertile 1 incomea	62.1	55.8	49.1
	—	P = 8.0 × 10−3	P = 1.2 × 10−7
Age + H-ESRD + male gender + tertile 3 incomea + tertile 1 incomea + inpatient dialysis	62.1	55.8	49.1
	—	P = 0.012	P = 2.1 × 10−7
Age + H-ESRD + male gender + tertile 3 incomea + tertile 1 incomea + inpatient dialysis + northeast regionb + south regionb	62.1	55.9	49.1
	—	P = 0.013	P = 1.7 × 10−7

P values represent significance model heterozygous and homozygous G1 risk allele coefficients compared with Wt controlling for all other variables in the model.

^aReference group is medium income.

^bReference group is Midwest/west.

^cReference group is Wt.