| Variable | Blue- Collar (n = 511) |
Lower White-Collar (n = 526) |
Upper White-Collar (n = 81) |
Self- Employed (n = 16) |
Other (n =24) |
p-Value for SEI Class |
Patients Not Reporting Socioeconomic Class n=302 |
Immigrant | Non- Immigrant |
p-Value for Immigrant Status |
|---|---|---|---|---|---|---|---|---|---|---|
| Age, years | 56 (13) |
54 (14) |
50 (16) |
63 (8.9) |
61 (17) |
0.001 | 57 (14) |
55 (13) |
55 (14) |
0.93 |
| Disease duration, months |
7.0 (4.5) |
6.8 (4.3) |
6.3 (3.3) |
5.3 (3.0) |
8.0 (4.7) |
0.25 | 6.8 (4.4) |
7.2 (4.5) |
6.8 (4.3) |
0.29 |
| Females, % | 63 | 80 | 64 | 25 | 92 | 0.000 | 67 | 76 | 70 | 0.10 |
| HAQ | 1.0 (0.6) | 0.98 (0.6) | 0.86 (0.6) |
0.65 (0.5) |
1.0 (0.6) |
0.08 | 1.0 (0.6) |
1.2 (0.7) |
0.97 (0.6) |
0.001 |
| DAS28 | 5.2 (1.3) |
5.3 (1.3) |
5.1 (1.1) |
5.0 (1.4) |
5.3 (1.2) |
0.60 | 5.2 (1.3) |
5.6 (1.2) |
5.2 (1.2) |
0.000 |
| VAS pain | 49 (24) |
44 (23) |
42 (24) |
43 (21) |
48 (24) |
0.005 | 47 (24) |
56 (25) |
45 (24) |
0.000 |
| VAS global | 45 (26) |
45 (25) |
41 (25) |
44 (20) |
46 (27) |
0.87 | 45 (26) |
53 (26) |
44 (25) |
0.000 |
| CRP | 31 (36) |
30 (34) |
29 (39) |
32 (24) |
31 (38) |
0.66 | 32 (38) |
33 (39) |
30 (36) |
0.31 |
| ESR | 34 (24) |
35 (24) |
30 (19) |
32 (22) |
40 (29) |
0.53 | 35 (26) |
37 (26) |
34 (24) |
0.19 |
| Swollen joints, 28-joint count |
10 (5.6) |
10 (5.8) |
9.7 (5.5) |
13 (6.1) |
8.2 (4.5) |
0.18 | 9.9 (5.6) |
11 (5.9) |
10 (5.7) |
0.42 |
| Tender joints, 28-joint count |
8.3 (6.3) |
8.5 (6.4) |
7.6 (5.4) |
7.5 (6.3) |
7.4 (5.4) |
0.85 | 7.9 (6.1) |
10 (6.6) |
8.0 (6.1) |
0.000 |
| Smokers, % | 28 | 21 | 16 | 33 | 13 | 0.03 | 26 | 24 | 24 | 0.69 |