Table 1.
Association between gestational weight gain and risk of autism spectrum disorders: Method of the database search strategy using PubMed, SCOPUS, Google Scholar and Embase
| Database (Search conducted up to June 27, 2020) | Search termsa | Number of studies searched |
|---|---|---|
| PubMed | #1 (((gestational weight gain [Title/Abstract]) OR (pregnancy weight gain [Title/Abstract])) OR (weight gain in pregnancy[Title/Abstract])) OR (weight gain during pregnancy[Title/Abstract]) | 4323 |
| #2 (((autism[Title/Abstract]) OR (ASD[Title/Abstract])) OR (developmental delay[Title/Abstract])) OR (developmental disorder[Title/Abstract]) | 64,806 | |
| #1 combined with #2 ((((gestational weight gain[Title/Abstract]) OR (pregnancy weight gain[Title/Abstract])) OR (weight gain in pregnancy[Title/Abstract])) OR (weight gain during pregnancy[Title/Abstract])) AND ((((autism[Title/Abstract]) OR (ASD[Title/Abstract])) OR (developmental delay[Title/Abstract])) OR (developmental disorder[Title/Abstract])) | 15 | |
| SCOPUS | (TITLE-ABS-KEY (“gestational weight gain”) OR TITLE-ABS-KEY (“pregnancy weight gain”) OR TITLE-ABS-KEY (“weight gain in pregnancy”) OR TITLE-ABS-KEY (“weight gain during pregnancy”) AND TITLE-ABS-KEY (“autism”) OR TITLE-ABS-KEY (“ASD”) OR TITLE-ABS-KEY (“developmental delay”) OR TITLE-ABS-KEY (“developmental disorder”)) AND DOCTYPE (ar) | 24 |
| Google Scholar | allintitle: “autism” OR “ASD” OR “developmental delay” OR “developmental disorder” “weight gain” | 24 |
| with at least one of the words: “autism” OR “ASD” OR “developmental delay” OR “developmental disorder” | ||
| with the exact phrase: weight gain | ||
| Embase | #1 ‘gestational weight gain’/exp. OR ‘pregnancy weight gain’/exp. OR ‘weight gain in pregnancy’ OR ‘weight gain during pregnancy’ | 4356 |
| #2 ‘autism’/exp. OR ‘asd’/exp. OR ‘developmental delay’/exp. OR ‘developmental disorder’/exp. | 139,670 | |
| #1 AND #2 | 28 | |
| Cochrane library | #1 (“gestational weight gain”):ti,ab,kw OR (“pregnancy weight gain”):ti,ab,kw OR (“weight gain in pregnancy”):ti,ab,kw OR (“weight gain during pregnancy”):ti,ab,kw | 791 |
| #2 (“autism”):ti,ab,kw OR (“autism spectrum disorder”):ti,ab,kw OR (“ASD”):ti,ab,kw OR (“developmental delay”):ti,ab,kw OR (“developmental disorder”):ti,ab,kw | 4481 | |
| #1 AND #2 | 1 | |
| Total | 92 |
aSearches were limited to original articles, and studies published in the English language using the appropriate filters and/or search terms depending on the database