Table 1 Stage of development of the Baltimore healthy carry-outs trial
| Stage 1 | Stage 2 | Stage 3 |
|---|---|---|
| Formative research | Development of intervention strategies | Implementation of pilot study |
| Apr 2009 – Dec 2010 | Dec 2010- Apr 2011 | Feb 2011- Sep 2011 |
| • In–depth interviews | • Multi-component intervention strategies | • Selection of intervention and matched comparison carry-outs |
| • Semi-structured questionnaires | • Materials development | • Three phase program: |
| • Direct observations | - Promoted foods | - Phase 1: Modified menu boards & menu labeling |
| • Focus groups | - Audience selection | - Phase 2: Healthy sides & beverages |
| • Conjoint analysis | - Target behaviors | - Phase 3: Affordable healthy combination meals |
| • Process evaluation |