Any link of gout disease control among hypertensive patients and onset of end-stage renal disease? Results from a population-based study

Table 5 Rate ratio of end-stage renal disease

	Rate ratio (95%CI)
	Cases occurring at follow-up and their controls
	Crude	Adjusted
Allopurinol adherence level
< 80%	Reference	Reference
≥ 80%	0.35 (0.14-0.89)	0.35 (0.13-0.91)
Chronic kidney disease at grade 1 to 31	8.06 (3.28-19.77)	8.00 (3.16-20.25)
Severity of hypertension (1 yr prior to ESRD)
< 3 antihypertensive agents	Reference	Reference
≥ 3 antihypertensive agents	1.94 (0.68-5.51)	1.19 (0.38-3.74)

¹Chronic kidney disease at grade 1 to 3 defined as having ICD-9 or ICD-10 with the absence of medication for phosphate binding or for hyperparathyroidism control. Chronic kidney disease and severity of hypertension were the variables used to obtain the adjusted estimators. CI: Confidence interval; ESRD: End-stage renal disease.