Table 1.

Four Dimension Criteria to Assess the Rigor of this Qualitative Study

Rigor Criteria	Strategies applied in our study
Credibility	• 17 interviews, 60 min each, January to May 2015 (five months) • Interview protocol, tested in two pilot interviews • Skillful researchers for interview and data analysis • Two moderators for each interview, one as interviewer and one as note-taker • Immediate debriefing after interviews • Double checking transcribed interviews notes taken by both researchers
Dependability	• Prepared study protocol and briefing before interviews • Track record of interviews and detailed information related • Coding accuracy and inter coders’ reliability testing (Kappa agreement testing) • Using software (NVIVO10) for analysis
Confirmability	• Immediate descriptive review of transcripts to identify diversities and similarities of data
Transferability	• Sampling based on Urban HEART results for classifying districts and selecting interviewees from all socio-economic classes • Examining repeated coding after each interview and not arisen new nodes and additional subthemes in the final analysis