Characteristics of 174 case patients with gastric cancer and 462 individually matched control subjects without gastric cancer in the Swedish cohort of 39,154 patients undergoing hip replacement surgery
| Characteristic | No. of cases (% of total) | Controls |
|---|---|---|
| Age (yrs) | ||
| <65 | 37 (21) | 100 (22) |
| 65–69 | 37 (21) | 100 (22) |
| 70–74 | 49 (28) | 137 (30) |
| ≥75 | 51 (29) | 125 (27) |
| Gender | ||
| Female | 74 (43) | 286 (62) |
| Male | 100 (57) | 176 (38) |
| Indication for index surgerya | ||
| Osteoarthritis | 114 (66) | 307 (66) |
| Acute fracture | 8 (5) | 31 (7) |
| Late sequelae after fracture | 48 (28) | 103 (22) |
| Rheumatoid arthritis | 7 (4) | 22 (5) |
| Other | 6 (3) | 16 (3) |
| No. of surgeriesb | ||
| 1 | 134 (77) | 361 (78) |
| 2 | 33 (19) | 85 (18) |
| ≥3 | 7 (4) | 16 (3) |
| History of gastric resection | ||
| No | 159 (91) | 447 (97) |
| Yes | 15 (9) | 15 (3) |
| Mean follow-up time (years) | 5.37 | 5.40 |
| Median duration of antibiotic treatment (days) | 8 | 9 |
a More than one indication was allowed, thus numbers exceed the total.
b The number of surgeries during follow-up includes index surgery.