Table 2.

Overview of Interview Themes and Subthemes.

Themes	Subthemes
(I) Characteristics of big data research	Variation in big data research definitions Examples of big data research
(2) REC mechanism in big data research	Frequency of big data research review RECs’ limited oversight mandate Criteria and guidelines used to review big data research Exceptionalism of big data research
(3) Implications of big data research	Benefits Challenges
(4) RECs’ needs in big data research	Training needs Procedural needs Regulatory needs

Note. REC = Research Ethics Committee.