Table 2. Characteristics of articles included in the meta-analysis of TNF-α –308 polymorphisms and susceptibility to pSS.
| Author | Country Year | Ethnicity | Case/Control | Age | Women/Men┬ | Criteria | Genotyping Method | Genotype | Genotype frequency | “A” allele frequency | ||
| pSS | Control | pSS | Control | |||||||||
| Correa PA, et al | Colombia 2005 | Caucasian | 67/430 | 49±13 | 67/0 | America - European Consensus criteria | PCR | AAAGGG | 13432 | 587338 | 0.27 | 0.11 |
| Gottenberg JE, et al | France 2003 | Caucasian | 129/96 | 56±13 | 115/14 | America - European Consensus criteria | PCR | AAAGGG | 95070 | 31677 | 0.26 | 0.11 |
| Bolstad AL, et al | Norway 2012/Sweden | Caucasian | 527/532 | 57.9±13.2 | 487/40 | American - European Consensus Criteria | Genotyping Assay | AAAGGG | – | – | 0.34 | 0.20 |
┬:only the number of female and male pSS patients in these studies.