TABLE 1.
Frequencies of characteristics of the 100 most-cited papers in maternal exposure to methylmercury and offspring health outcomes.
| Characteristics | Number of papers | Number of citations a |
|---|---|---|
| Period of time of publication | ||
| 1972–1979 | 11 | 3,043 |
| 1980–1989 | 6 | 1,078 |
| 1990–1999 | 18 | 6,547 |
| 2000–2009 | 50 | 14,581 |
| 2010–2017 | 15 | 3,959 |
| Number of authors | ||
| 1–2 | 19 | 9,856 |
| 3–4 | 27 | 6,436 |
| 5–6 | 20 | 4,348 |
| >6 | 34 | 8,568 |
| Study design | ||
| Laboratorial studies (in vivo) | 8 | 1,173 |
| Case report | 4 | 767 |
| Case series | 1 | 142 |
| Cross-sectional | 12 | 3,285 |
| Case-control | 3 | 761 |
| Cohort | 32 | 7,367 |
| Non-systematic review | 38 | 15,307 |
| Systematic review | ||
| Without meta-analysis | 1 | 129 |
| With meta-analysis | 1 | 277 |
a
Number of citations in web of science “all databases” section.