Table 2. Ever-use of NSAIDs and descriptive statistics of total number of prescriptions among ever-users by case-control status and drug category.
| Drug categorya | No (%) of ever-users | No. of prescriptions among ever-users | |||||
| Mean | SD | Q1 | Median | Q3 | Max | ||
| Aspirin | |||||||
| Controls | 17469(48.7) | 6.5 | 13.0 | 1.0 | 2.0 | 5.0 | 238.0 |
| Cases | 4653(51.7) | 6.6 | 13.6 | 1.0 | 2.0 | 5.0 | 172.0 |
| Coxibs | |||||||
| Controls | 100(0.3) | 3.4 | 3.0 | 1.0 | 2.0 | 5.0 | 14.0 |
| Cases | 27(0.3) | 3.1 | 2.2 | 1.0 | 3.0 | 4.0 | 9.0 |
| Arylacetic acids | |||||||
| Controls | 16779(46.7) | 7.3 | 14.2 | 1.0 | 3.0 | 6.0 | 283.0 |
| Cases | 4442(49.3) | 7.1 | 13.2 | 1.0 | 3.0 | 6.0 | 141.0 |
| Butylpyrazolidines | |||||||
| Controls | 6102(17.0) | 2.6 | 4.6 | 1.0 | 1.0 | 2.0 | 122.0 |
| Cases | 1657(18.4) | 2.6 | 4.1 | 1.0 | 1.0 | 2.0 | 81.0 |
| Fenamates | |||||||
| Controls | 833(2.3) | 2.5 | 7.5 | 1.0 | 1.0 | 2.0 | 95.0 |
| Cases | 234(2.6) | 1.9 | 3.3 | 1.0 | 1.0 | 2.0 | 43.0 |
| Oxicams | |||||||
| Controls | 5976(16.7) | 4.9 | 9.1 | 1.0 | 2.0 | 4.0 | 164.0 |
| Cases | 1620(18.0) | 5.0 | 9.2 | 1.0 | 2.0 | 4.0 | 100.0 |
| Propionates | |||||||
| Controls | 18667(52.0) | 6.4 | 12.3 | 1.0 | 2.0 | 6.0 | 208.0 |
| Cases | 4881(54.2) | 6.1 | 11.1 | 1.0 | 2.0 | 6.0 | 151.0 |
| NA-NSAIDs | |||||||
| Controls | 25542(71.2) | 11.3 | 19.8 | 2.0 | 4.0 | 11.0 | 330.0 |
| Cases | 6683(74.2) | 11.1 | 18.2 | 2.0 | 4.0 | 11.0 | 216.0 |
| NSAIDs | |||||||
| Controls | 28516(79.5) | 14.2 | 23.5 | 2.0 | 6.0 | 15.0 | 372.0 |
| Cases | 7406(82.2) | 14.2 | 22.5 | 2.0 | 6.0 | 15.0 | 295.0 |
a) See Table 1 for a list of drugs in each category.
SD: standard deviation; Q1 and Q3: First and third quartiles.