Table 1

Checklist of strategies to ensure rigour in the conduct and reporting of the study

Research step	Criteria	Action taken
Quantitative component	Dependability	Data collection will be conducted using standardised scripts.
	Credibility and confirmability	Reflexive notes will be taken during data collection to record situational information.
	Confirmability	Reasons for non-participation will be noted.
	Confirmability	All statistical analyses will be performed according to a prespecified protocol.
Qualitative component	Dependability	Data collection will be conducted used standardised scripts.
	Confirmability	Reasons for loss to follow-up will be noted.
	Credibility and confirmability	Reflexive notes will be taken during data collection to record situational information.
	Dependability	A sample of the transcripts (eg, 10%) from each site will be checked against the audio recordings.
	Credibility	More than one person will be involved in the analysis of interview data.
	Credibility	Persons involved in the analysis of interview transcripts will look for disconfirming data while developing themes to ensure that all aspects of the interviews were considered.
	Dependability	An investigator with proficiency in English and Spanish will compare the English and Spanish findings.
Mixed methods component	Credibility	The justification for using a mixed methods approach to answer the research question(s) will be described.
	Credibility	The study design will be described in terms of the purpose, priority and sequence of methods.
	Credibility	The process of integration will be described in terms of where it occurred, how it occurred and who participated in it.
	Credibility	The limitation of one method associated with the presence of the other method will be described.
	Credibility	Insights gained from mixing or integrating methods will be described.
	Credibility	The integration of quantitative and qualitative research methods will occur at multiple points of the mixed methods study (eg, research question, sampling strategy and analysis).
	Confirmability and dependability	Each data source will be triangulated to confirm convergence or divergence across datasets and study sites.
	Credibility	Inconsistencies between quantitative and qualitative findings will be explored.
	Credibility	The inferences derived from the quantitative and qualitative findings will be incorporated into meta-inferences.
Entire study	Confirmability	An audit trail will be maintained by the research coordinator to document all study decisions (and their rationale) and all sampling, data collection and analysis procedures implemented.
Entire study	Confirmability	Any deviations from the published protocol will be noted and justified to promote transparency of the research methods.