Table 6.

Pharmacological intervention after referral

Medication initiated	Operational definition	Scale of measurement
ESA therapy	Initiation of ESA in participants whose Hb is <100 g/L	Y or N. If yes, date of initiation or titration if available
ACE-I or ARB	Initiation of ACE-I or ARB	Y or N. If yes, date of initiation
Other antihypertensive medication	Initiation of other antihypertensive medication	Y or N. If yes, date of initiation
Calcium supplements	Calcium supplements	Y or N. If yes, date of initiation
Vitamin D supplements	Vitamin D supplements	Y or N. If yes, date of initiation
Lipid lowering drugs	Lipid-lowering drugs	Y or N. If yes, date of initiation
Loop diuretics	Loop diuretics	Y or N. If yes, date of initiation

ACE-I, ACE inhibitors; ARB, angiotensin receptor blockers; ESA, erythropoiesis stimulating agent; Hb, haemoglobin.