Table 2.
Cases (%) (n = 1,032) | Controls (%) (n = 1,041) | Unadjusted P Value | |
---|---|---|---|
History of comorbidities | |||
Rheumatoid arthritis | 103 (10%) | 83 (8%) | .1292 |
Systemic lupus erythematosus | 27 (3%) | 5 (0.5%) | <.0001 |
Autoimmune thyroid disease | 93 (9%) | 11 (1%) | <.0001 |
Raynaud syndrome | 118 (12%) | 23 (2%) | <.0001 |
Sjögren syndrome | 102 (10%) | 5 (0.5%) | <.0001 |
Scleroderma | 24 (2%) | 0 | <.0001 |
Polymyositis | 6 (0.6%) | 1 (0.1%) | .0684 |
Any of the above | 323 (32%) | 131 (13%) | <.0001 |
Diabetes mellitus | 99 (10%) | 119 (11%) | .1744 |
Hypercholesterolemia | 582 (58%) | 445 (46%) | <.0001 |
History of urinary tract infections | 612 (59%) | 536 (52%) | .0003 |
History of breast cancer* | 31 (3%) | 45 (5%) | .1277 |
Asthma | 124 (12%) | 141 (14%) | NS |
Hay fever | 141 (14%) | 186 (18%) | .0113 |
History of surgery | |||
Tonsillectomy | 584 (57%) | 518 (50%) | 0.0018 |
Appendectomy | 257 (25%) | 285 (27%) | NS |
Gallbladder removal | 278 (27%) | 179 (17%) | <0.0001 |
Colon polyp removal | 190 (18%) | 132 (13%) | 0.0003 |
Uterine fibroid removal* | 161 (17%) | 140 (15%) | 0.1491 |
Ovarian cyst removal* | 127 (13%) | 121 (13%) | NS |
Thyroid surgery | 23 (2%) | 23 (2%) | NS |
Cesarean section* | 117 (12%) | 124 (13%) | NS |
NOTE. Only P values beyond the .2 level for the comparison between patient groups are reported.
Abbreviation: NS, nonsignificant.
Referred to female cases and controls only.