Impact of obesity and income on the likelihood of kidney transplantation: A retrospective cohort study

Table 4 Multivariable Fine-Gray proportional sub-distribution hazards model assessing the interaction between income and body mass index for time from listing to receiving a deceased or living donor kidney transplant

	Non-Hispanic White candidates		Non-Hispanic Black candidates		Hispanic/Latino candidates
Characteristic	sHR (95%CI)	P value	sHR (95%CI)	P value	sHR (95%CI)	P value
Sub-distribution hazard ratios for time from listing to receiving a deceased donor kidney transplant1
BMI: < 30 & high income	1 (Reference)		1 (Reference)		1 (Reference)
BMI: < 30 & middle income	1.13 (1.06, 1.20)	< 0.001	0.98 (0.91, 1.06)	0.66	0.93 (0.83, 1.03)	0.16
BMI: < 30 & low income	1.34 (1.23, 1.46)	< 0.001	1.03 (0.94, 1.13)	0.49	1.16 (1.02, 1.32)	0.02
BMI: 30- < 35 & high income	0.97 (0.91, 1.03)	0.31	0.92 (0.85, 0.99)	0.04	0.83 (0.74, 0.93)	< 0.001
BMI: 30- < 35 & middle income	0.98 (0.90, 1.06)	0.58	1.05 (0.95, 1.17)	0.36	1.43 (1.23, 1.66)	< 0.001
BMI: 30- < 35 & low income	0.91 (0.83, 1.00)	0.05	0.98 (0.89, 1.08)	0.68	1.11 (0.95, 1.30)	0.18
BMI: ≥ 35 & high income	0.75 (0.69, 0.82)	< 0.001	0.86 (0.78, 0.95)	< 0.001	0.84 (0.72, 0.98)	0.03
BMI: ≥ 35 & middle income	1.09 (0.97, 1.21)	0.14	1.21 (1.06, 1.37)	< 0.001	1.31 (1.07, 1.59)	0.01
BMI: ≥ 35 & low income	1.16 (1.04, 1.30)	0.01	1.13 (1.01, 1.26)	0.03	1.07 (0.88, 1.30)	0.50
Sub-distribution hazard ratios for time from listing to receiving a living donor kidney transplant1
BMI: < 30 & high income	1 (Reference)		1 (Reference)		1 (Reference)
BMI: < 30 & middle income	0.73 (0.68, 0.78)	< 0.001	0.66 (0.57, 0.77)	< 0.001	1.11 (0.97, 1.26)	0.14
BMI: < 30 & low income	0.53 (0.49, 0.58)	< 0.001	0.41 (0.34, 0.48)	< 0.001	0.81 (0.66, 0.97)	0.03
BMI: 30- < 35 & high income	0.94 (0.88, 1.00)	0.06	0.98 (0.82, 1.16)	0.78	1.01 (0.88, 1.17)	0.84
BMI: 30- < 35 & middle income	1.04 (0.94, 1.15)	0.49	0.84 (0.65, 1.09)	0.20	0.79 (0.64, 0.96)	0.02
BMI: 30- < 35 & low income	0.96 (0.84, 1.09)	0.52	1.08 (0.83, 1.42)	0.56	0.84 (0.68, 1.05)	0.14
BMI: ≥ 35 & high income	0.86 (0.80, 0.93)	< 0.001	0.85 (0.67, 1.07)	0.17	0.81 (0.67, 0.98)	0.03
BMI: ≥ 35 & middle income	0.99 (0.88, 1.11)	0.82	0.80 (0.58, 1.11)	0.18	0.73 (0.56, 0.97)	0.03
BMI: ≥ 35 & low income	0.87 (0.75, 1.01)	0.07	1.02 (0.74, 1.41)	0.90	1.29 (0.97, 1.72)	0.08

¹Models adjusted for candidate age, birth sex, blood type, calculated panel reactive antibody at listing, time on dialysis, diagnosis, history of peripheral vascular disease, prior transplant, distance from transplant center, education, social vulnerability index, and year of listing. BMI: Body mass index; sHR: Sub-distribution hazard ratio; CI: Confidence interval.