Table 1.
Flowchart of the study population.
| Cases | Controls | |
|---|---|---|
| Identified in VEGA | 56,771 | |
| Identified in The Swedish Census Register | 110,081 | |
| Re-used/missing personal identification number | −78 | 0 |
| = | 56,693 | 110,081 |
| No diagnosis of gout | −6,199 | N/A |
| = | 50,494 | 110,081 |
| Not WSHCR resident | −117 | 0 |
| = | 50,377 | 110,081 |
| Gout diagnosis before 2006 | −11,249 | −69 |
| = | 39,128 | 110,012 |
| Gout diagnosis after 2015 | −9,932 | N/A |
| = | 29,196 | 110,012 |
| First emigration date before diagnosis | −216 | −28 |
| = | 28,980 | 109,984 |
| First immigration date 30 days after diagnosis | −43 | −176 |
| = | 28,937 | 109,808 |
| ULT (M04AA, M04AB) within 5 years before diagnosis | −6,860 | −1,432 |
| = | 22,077 | 108,376 |
| Age at diagnosis <18 years | −22 | |
| = | 22,055 | 108,376 |
| Died before Index date | 0 | −291 |
| 22,055 | 108,085 | |
| Control more than once | N/A | −9,139 |
| Study population | 22,055 | 98,946 |
WSHCR, Western Sweden Health Care Region; VGR, western sweden health care region. N/A, not applicable.