Table 4 Regression analyses to identify work disability status in 5,493 individuals younger than 65 years in the QUEST-RA study in 32 countries with a high (>24K USD) or low (<11K USD) GDP
| Type of country | Onset of RA | Sex, male | Age | Education lowest 2/3 | RF-positive, ever | Erosion-positive, ever | HAQ | ESR | SJC28 | Constant |
|---|---|---|---|---|---|---|---|---|---|---|
| All countries |
1.46 (1.26-1.68) |
0.99 (0.99-1.0) |
1.36 (1.21-1.54) |
1.10 (0.96-1.26) |
1.74 (1.53-1.96) |
2.76 (2.53-3.01) |
1.00 (0.99-1.00) |
0.99 (0.98-1.00) | 0.13 | |
| Low-GDP | Pre-2000 |
2.04 (1.38-3.02) |
0.98 (0.97-0.99) |
1.22 (0.95-1.58) |
1.52 (1.12-2.08) |
1.97 (1.40-2.76) |
2.65 (2.19-3.19) |
1.00 (0.99-1.00) |
0.98 (0.96-1.01) | 0.32 |
| Post-2000 |
1.26 (0.92-1.74) |
1.00 (0.99-1.01) |
1.65 (1.27-2.14) |
1.07 (0.82-1.42) |
2.10 (1.64-2.69) |
2.33 (1.93-2.81) |
1.00 (0.99-1.01) |
0.98 (0.95-1.00) | 0.07 | |
| High-GDP | Pre-2000 |
1.41 (1.10-1.79) |
0.99 (0.98-1.00) |
1.40 (1.13-1.73) |
0.89 (0.70-1.14) |
1.12 (0.89-1.42) |
2.94 (2.52-3.43) |
1.00 (0.99-1.01) |
1.00 (0.98-1.02) | 0.25 |
| Post-2000 |
1.71 (1.29-2.26) |
0.99 (0.98-1.00) |
1.43 (1.09-1.87) |
0.99 (0.75-1.30) |
1.16 (0.90-1.50) |
2.89 (2.36-3.54) |
1.00 (0.99-1.01) |
1.02 (0.99-1.05) | 0.15 |