Table 2.

General characteristics of the included studies

Study/author/year/country	Study aims	Study design	Data collection tools
Cnossen et al. (2016) [43] The Netherlands	Aim: To explore the feasibility of a self-care education programme, by measuring intervention usage, uptake and the end-user satisfaction, in addition to secondary care	Quantitative study A single-group cross-sectional feasibility and satisfaction study design	Study-specific survey 10-point Likert scale A study-specific questionnaire
Foster et al. (2016) [38] United Kingdom	Aim: To assess the proof of concept of the RESTORE web-based intervention	Mixed-methods study A multicentre parallel-group two-armed exploratory randomized controlled trial with qualitative process evaluation	Semi-structured telephone interviews Data usage Questionnaires
Harder et al. (2017) [44] United Kingdom	Aim: To present the development process of the bWell app and the preliminary results of early user testing	Qualitative focus group study with preliminary user testing	Focus group discussions
Kanera et al. (2016) [39] The Netherlands	Aim: To assess the effects of the web-based life after cancer (KNW) intervention on the outcomes: physical activity, diet and smoking 6 months after using the KNW intervention	Quantitative study A randomized controlled trial	Online self-report questionnaires Data usage Login data
Kanera et al. (2017) [36] The Netherlands	Aim: To assess the long-term effects of the web-based life after cancer (KNW) intervention on the outcomes for moderate physical activity and vegetable consumption at 12 months after using the KNW intervention in order to track maintenance of these 2 outcomes between 6 months post baseline and 12 months	Quantitative study A randomized controlled trial	Online self-report questionnaires Data usage Login data
Lee et al. (2013) [46] Republic of Korea	Aim: To design and develop a web-based self-management diet and exercise intervention for cancer survivors which is based on the trans-theoretical model and to formally evaluate the intervention	A mixed-method qualitative and quantitative intervention development and formal evaluation study	Qualitative semi-structured interviews Questionnaires with 7-point scale Intervention usage
Lee et al. (2014) [40] South Korea	Aim: To investigate if the web-based self-management exercise and diet intervention (WSEDI) for breast cancer survivors based on the trans-theoretical model is feasible and having a primary effect on improving the quality of dietary behaviours and exercising.	Quantitative study A 12-week pilot randomized controlled trial with a control group	Self-reported online surveys 7-day exercise diary 3-day dietary recall Cancer-specific questionnaires Intervention usage
Melissant et al. (2018) [41] The Netherlands	Aim: To evaluate the feasibility of the Oncokompas intervention among breast cancer survivors, featuring the breast cancer module	Quantitative study A pre-test-post-test feasibility study	Semi-structured interviews Pre- and post-intervention surveys Consultation with oncology nurse Intervention usage
Myall et al. (2015) [45] United Kingdom	Aim: To explore the amount of work that the participants in the RCT related to this intervention were required to do	An in-depth qualitative process evaluation study	Semi-structured telephone interviews
Paxton et al. (2017) [42] United States	Aim(s): 1. To investigate if participants from the physical activity (PA) group would have greater improved moderate to physical activity level than those participants randomized in the Dietary group 2. To investigate if participants from the dietary group would have greater improved fruit and vegetable consumption than those participants randomized in the PA group	Quantitative study A randomized parallel-group feasibility study	Web-based survey consisting of 5-point Likert scaled questions Web-based survey: a yes/no question Web-based survey with open-ended questions Website usage tracking
Willems et al. (2017) [37] The Netherlands	Aim: To present the short-term effects of the KNW intervention on QoL, anxiety, depression and fatigue	Quantitative study A randomized controlled trial	Self-report questionnaires Modules usage