Table 3.
Variables included in data extraction template
| General Information | |
| Study title | |
| Type of RCT (i.e. standard parallel arm; crossover; cluster) | |
| Start and end date; duration | |
| Country | |
| Funding source | |
| Population and setting | |
| Gender | |
| Age group | |
| Focused diseases/conditions, if any | |
| Menopause status, if relevant | |
| Total number of participants | |
| Source/setting of the population | |
| Method(s) of recruitment and sampling technique | |
| Intervention and comparator | |
| Protein source | |
| Energy content (kcal) | |
| Protein content (grams) | |
| Number of participants in each arm | |
| Compliance | |
| Dropout rate | |
| Additional features of interventions | |
| Physical activity | |
| Supplementary micronutrients | |
| Outcomes | |
| Muscle health outcomes of interest | |
| Measurement method | |
| Unit of analysis | |
| Time points measured | |
| Summary statistics at baseline and at all study time points (mean, SD, P-value, and 95% CI) |