Table 2.

Incidence rate ratios for new onset hypertension

	Match 1:4 on race, sex, age, BMI, BP			Model 2 dropping risk sets where the case has < 2 BMIs
	IRR	95% CI	p	IRR	95% CI	p	IRR	95% CI	p
Donor vs. non-donor	1.16	0.94–1.43	0.16	1.25	0.99–1.58	0.05
Stable (change ≤5%)				Ref
Lost >5%				0.74	0.61–0.91	0.004
Gain >5%				1.33	1.17–1.52	< 0.001
Enrollment year	0.97	0.96–0.98	< 0.001	0.97	0.96–0.98	< 0.001	0.97	0.96–0.98	< 0.001
Stable donor (142/741) vs. stable non-donor (977/4,150)							1.12	0.86–1.46	0.39
Donor loss >5% (22/178) vs. stable non-donor							0.62	0.38–1.03	0.06
Donor gain >5% (101/315) vs. stable non-donor							2.27	1.66–3.09	< 0.001
Non-donor loss >5% (126/612) vs. stable non-donor							0.80	0.64–1.00	0.05
Non-donor gain >5% (542/1,929) vs. stable non-donor							1.24	1.08–1.43	0.003
Donor loss >5% vs. non-donor loss >5%							0.78	0.46–1.34	0.36
Donor gain >5% vs. non-donor gain >5%							1.83	1.32–2.53	< 0.001
Observations	8,480			7,925			7,925
Donors	832			720			720
Non-donors	2,931			2,915			2,915
Relative excess risk due to the interaction (RERI)							0.90	0.24–1.56	0.007
Attributable proportion							0.40	0.20–0.59	< 0.001