Table 2.

Incidence of index hyperkalemic event

	Number of patients with index HK	Incidence of index HK event per 100 person-years (95% CI)
Overall	195,178	2.86 (2.83–2.89)
Serum K+ level during HK event, mmol/L
5.0 to ≤ 5.5 or CPRD diagnosis code in the absence of laboratory results	177,945	2.61 (2.58–2.63)
> 5.5 to ≤ 6.0	14,020	0.21 (0.20–0.21)
> 6.0 or HES diagnosis code, regardless of serum K+ level	3213	0.05 (0.04–0.05)

CI confidence interval, CPRD Clinical Practice Research Datalink, HES Hospital Episode Statistics, HK hyperkalemia, K⁺ potassium