- Number of studies: number of studies reporting these data
- Number of items: number of items reporting these data
- Sample size (respondents): total number of respondents to any item under this heading or subheading across the included studies
- N (+; Yes; True): total number of respondents who responded +, Yes or True to any item under this heading or subheading across the included studies
- Pooled %: calculated value using previous columns N/sample size
- Mean of %: average of the percentages reported in the studies for the items under this heading or subheading
- Min %: minimum of the percentages reported in the studies for the items under this heading or subheading
- Max. %: maximum of the percentages reported in the studies for the items under this heading or subheading
- Colour scale:
from lowest to highest percentages