Table A1. Electronic search strategy.
| |
PubMed/Embase search |
CNKI/VJIP search |
Where treated |
|---|---|---|---|
| (English database) | (Chinese database) | ||
| 1 |
Oesophageal cancer |
 |
Title/abstract |
| 2 |
Oesophageal squamous cell carcinoma |
 |
Title/abstract |
| 3 |
Oesophageal neoplasm |
 |
Title/abstract |
| 4 |
Dietary pattern |
 |
Title/abstract |
| 5 |
Nutrients pattern |
 |
Title/abstract |
| 6 |
Food pattern |
 |
Title/abstract |
| 7 |
Eating pattern |
 |
Title/abstract |
| 8 |
Dietary habits |
 |
Title/abstract |
| 9 |
Diet |
 |
Title/abstract |
| 10 |
Dietary |
 |
Title/abstract |
| 11 |
Nutrients |
 |
Title/abstract |
| 12 |
1 OR 2 OR 3 |
||
| 13 |
4 OR 5 OR 6 OR 7 OR 8 OR 9 OR 10 OR11 |
||
| 14 |
12 and 13 |
||
| 15 |
Limited to English or Chinese language |
||
| 16 |
Limited to humans study |
||
| 17 |
Limited to factor analysis/principle component factor analysis/cluster analysis |
||
| 18 | Limited 14 to (15 and 16 and 17) | ||
Databases searched, PubMed (http://www.ncbi.nlm.nih.gov/pubmed/), Embase (http://www.embase.com), CNKI (http://www.cnki.net/), VJIP (http://en.cqvip.com/), Citation tracking, ISI Web of Science (http://apps.isiknowledge.com), Scopus (http://www.scopus.com).