Table 1.

Overview of data collection in ReLife at the three time points after treatment

	Measures	3 months	1 year	2 years
Questionnaires
Sociodemographic data	Date of birth, gender, country of birth of participant, father, mother, race, living situation, marital status, highest level of education and working history	X
Anthropometry	Height at baseline, weight 2 years before diagnosis, weight loss 3–6 months before diagnosis and average weight during adult life	X
	Current body weight and waist and hip circumference	X	X	X
Lifestyle	Current and past smoking behaviour, including dose and duration, alcohol consumption, (reasons for) changes in eating habits and mobility	X	X	X
	SQUASH (29)	X	X	X
	Frequency and amount of alcohol consumption during week and weekend days (32–34)	X	X	X
	Changes in eating habits and reasons for/type of changes		X	X
Medical history	Previously diagnosed with cancer and family history of cancer	X
	Comorbidities, medication use and dietary supplement use	X	X	X
Diet	163-item Food Frequency Questionnaire	X	X	X
HRQoL	EORTC QLQ-C3044	X	X	X
Accelerometer
	Habitual physical (in)activity and sedentary behaviour	X	X	X
Blood
	EDTA whole blood for DNA isolation	X
	EDTA plasma and serum	X	X	X
Tissue
	Formalin-fixed paraffin-embedded tissue of the primary tumour	X*
CT scan
	Diagnostic CT scan	X
	Follow-up CT scans		X†	X†
Clinical data
	Disease characteristics and treatment	X	X	X
	Postoperative outcomes, recurrence and progression	X	X	X

*To date only permission, no actual collection.

†Dependent on availability.

EORTC-QLQ-C30, European Organisation for Research and Treatment of Cancer quality of life questionnaire; HRQoL, health-related quality of life; ReLife, Renal cell cancer: Lifestyle, prognosis and quality of life; SQUASH, short questionnaire to assess health-enhancing physical activity.