Table 1.

Measurement domains and data collection time points

Theme	Instruments	Baseline	6 Months	1 Year	3 Years	5 Years
Demographic and socioeconomic characteristics	Sociodemographic	×
	Socioeconomy background (questionnaire)	×	×
Quality of life	European Organization for Research and Treatment of Cancer Core Quality of Life Questionnaire (EORTC QLQ-C30)	×	×	×	×	×
	EORTC of Cancer Breast Cancer Quality of Life Questionnaire (QLQ-BR23)	×	×	×	×	×
Body weight and nutrition	Anthropometric measurement (body mass index, waist-to-hip ratio)	×	×	×	×	×
	Food diary and mini-food album			×	×	×
Physical activity	Global Physical Activity Questionnaire (GPAQ)	×	×	×	×	×
Complementary and alternative medicine (CAM)	CAM questionnaire	×	×	×	×	×
Psychosocial factors	Hospital Anxiety and Depression Score (HADS) and	×	×	×	×	×
	Distress Thermometer (questionnaire)	×	×	×	×	×
Work-related factors	Return to work self-efficacy scale (RTW-SE)	×	×	×	×	×
	Readiness for RTW scale	×	×	×	×	×
Clinical, histological and biological factors	Clinical registry	×	×	×	×	×
	Biobank (blood, urine and tissues)	×		× (only blood)