Age | 20s | 30s | 40s | 50s | 60s | 70s | 80s | Total | p-value * |
---|
Our study | 16 (10.5%) | 59 (38.8%) | 55 (36.2%) | 14 (9.2%) | 7 (4.6%) | 1 (0.7%) | 0 (0.0%) | 152 | – |
Hayashi [6] | 43 (16.7%) | 45 (17.5%) | 45 (17.5%) | 45 (17.5%) | 45 (17.5%) | 34 (13.2%) | 0 (0.0%) | 257 | < 0.01 † |
Hayashi [22] | 178 (12.6%) | 245 (17.3%) | 232 (16.5%) | 202 (14.3%) | 308 (21.9%) | 209 (14.8%) | 35 (2.5%) | 1409 | < 0.01 † |
- The percentage in parentheses represents the proportion in all cases
- In a previous study, those in their 20s had the highest ANA-positive rate (16.3%), followed by those in their 60s (14.9%), 30s (13.1%), 50s (11.9%), 70s (10.5%), and 40s (9.5%) for dilutions of 1:160 or higher. For dilutions of 1:40 or higher, healthy women in their 20s had the highest ANA-positive rate (39.9%), followed by those in their 30s (33.1%), 50s (31.2%), 60s (30.8%), 70s (30.1%), and 40s (28.4%) for dilutions of 1:40 or higher [22]
- *p-values were calculated for the distribution of age between this study and a previous study [6, 22]
- †Mann-Whitney U-test
- Abbreviations: ANA anti-nuclear antibody