Table 1 Eligibility criteria for the NightLife study

Workstream 1 (main randomised controlled trial)

Inclusion criteria:

 • Adults (≥ 18 years);

 • End-stage kidney failure receiving thrice-weekly in-centre haemodialysis for at least 3 months

 • Able to provide written informed consent;

 • Able participate fully in follow-up

Exclusion criteria:

 • Currently receiving in-centre nocturnal haemodialysis;

 • < 3 months since stopping extended daytime dialysis or in-centre nocturnal haemodialysis;

 • Extended-hours haemodialysis is clinically indicated (e.g. calciphylaxis, pregnancy)

 • Scheduled living-donor transplant in the next 6 months;

 • Plans to change dialysis modality in the next 6 months;

 • Life expectancy < 6 months;

 • Current participation in an interventional trial with conflicting therapies or primary outcome

Workstream 2 (Process Evaluation)

Staff inclusion criteria

 • Clinical and non-clinical staff working at haemodialysis units participating in the NightLife study;

 • Adults (≥ 18 years);

 • Ability to give written informed consent;

 • Ability and willingness to participate fully in the observations and interviews

Relative/visitor inclusion criteria

 • Relatives or visitors accompanying patients (that fulfil workstream 1 eligibility criteria) to haemodialysis sessions;

 • Adults (age ≥ 18 years);

 • Ability to give written informed consent;

 • Ability and willingness to participate fully in the observations and interviews

Workstream 3 (QuinteT recruitment intervention)

Staff inclusion criteria

 • Clinical and non-clinical staff working involved in overseeing or recruiting to the NightLife study;

 • Adults (≥ 18 years);

 • Ability to give informed consent