Table 1.
Characteristics of the content analysis studies included in the systematic review, n 64
| Characteristics | n | % | References |
|---|---|---|---|
| Year published | |||
| ≥ 2020 | 14 | 21·9 | (41,44,50–52,64,65,73,88,89,112) |
| 2010–2019 | 42 | 65·6 | (34–40,42,45,47,53–60,66–72,74–77,81,83–87,90–93,113,114) |
| 2000–2009 | 7 | 10·9 | (43,46,48,61,62,78,82) |
| ≤ 1999 | 1 | 1·6 | (94) |
| Online environment* | |||
| Websites | 53 | 82·8 | (34,36–41,43,45–48,50–53,55,56,58,61,62,64–69,71,73–83,86–93,112–115) |
| Wikipedia | 2 | 3·1 | (71,92) |
| Social media | 12 | 18·8 | (35,42,44,54,57,58,63,70,72,84,85,116) |
| YouTube | 6 | 9·4 | (35,42,58,63,70,85) |
| Blogs | 3 | 4·7 | (44,72,84) |
| 1 | 1·6 | (76) | |
| 1 | 1·6 | (97) | |
| 1 | 1·6 | (60) | |
| Evaluation of | |||
| Accuracy | 23 | 35·9 | (36,40,42,43,51,53–55,57,60,67,68,71,74–80,115,116) |
| Quality | 17 | 26·6 | (34,35,38,39,44,47,83,86–91,93,112–114) |
| Accuracy and quality | 24 | 37·5 | (37,41,45,46,48,50,52,56,58,59,61–64,66,70,72,73,81,82,84,85,92) |
| Country/countries of interest | |||
| High income | 28 | 43·8 | (40–42,44,48,50,51,53,54,59,61,62,65,66,72,73,76,78,80,82,84,88,89,91,93,112,113,115) |
| Middle income | 1 | 1·6 | (37) |
| Low income | 0 | 0 | – |
| N/A – no location specified | 35 | 54·7 | (34–36,38,39,43,45–47,52,55–58,60,63,64,67–71,74,75,77,79,81,83,85–87,90,92,114,116) |
| Nutrition-related topic studied* | |||
| Disease management | 17 | 26·6 | (34,36,40–43,47,55,58–60,62,75,81,91,93,115) |
| General | 15 | 23·4 | (37,39,48,50,56,65,71,76,78,79,82,84,92,112,116) |
| Maternal and child | 10 | 15·6 | (38,46,51,53,61,73,74,77,80,88) |
| Supplements | 6 | 9·4 | (35,54,64,65,89,113) |
| Weight loss | 6 | 9·4 | (44,57,63,66,69,83) |
| Dietary patterns | 4 | 6·3 | (38,72,87,90) |
| Disease prevention | 3 | 4·7 | (45,81,86) |
| Sports nutrition | 2 | 3·1 | (38,67) |
| Immune function | 2 | 3·1 | (65,114) |
| Food safety | 2 | 3·1 | (52,85) |
| Other | 2 | 3·1 | (68,70) |
*
Studies may fall under more than one category.