From: Familial risk of systemic sclerosis and co-aggregation of autoimmune diseases in affected families
Variables | ≥1 Affected relatives | General population | P value |
---|---|---|---|
No. | 3801 | 23,658,577 | |
Male gender (n (%)) | 2037 (53.59) | 11,732,064 (49.59) | <0.001 |
Age (years) (mean ± SD) | 46.6 ± 16.2 | 37.5 ± 20.4 | <0.001 |
Systemic sclerosis (n (%)) | 3 (0.08) | 1891 (0.008) | <0.001 |
Place of residence (n (%)) | |||
Urban | 2421 (63.69) | 13,935,055 (58.90) | <0.001 |
Suburban | 991 (26.07) | 6,581,657 (27.82) | |
Rural | 267 (7.02) | 2,186,647 (9.24) | |
Unknown | 122 (3.21) | 955,218 (4.04) | |
Income levels (n (%)) | |||
Quintile 1 | 594 (15.63) | 4,077,139 (17.23) | <0.001 |
Quintile 2 | 529 (13.92) | 3,334,917 (14.10) | |
Quintile 3 | 881 (23.18) | 6,296,926 (26.62) | |
Quintile 4 | 830 (21.84) | 4,547,059 (19.22) | |
Quintile 5 | 847 (22.28) | 4,437,878 (18.76) | |
Unknown | 120 (3.16) | 964,658 (4.08) | |
Occupation (n (%)) | |||
Dependents of the insured individuals | 1185 (31.18) | 9,209,334 (38.93) | <0.001 |
Civil servants, teachers, military personnel and veterans | 195 (5.13) | 984,451 (4.16) | |
Non-manual workers and professionals | 1426 (3752) | 6,357,208 (26.87) | |
Manual workers | 631 (16.60) | 4,885,084 (20.65) | |
Other | 364 (9.58) | 2,222,500 (9.39) |