Table 4.
Bivariate analysis (Chi 2 test) testing the association between the initial symptoms of Chikungunya infection associated with long-term arthritis on the MCA Graph and rheumatic disorders declared at 30 months by CHIKV + Patients (N = 85), Cohort of French Gendarmes (2006–2008)
| |
No rheumatic disorders |
Arthralgia
c
|
P* |
Arthritis
c
|
P** |
|---|---|---|---|---|---|
| N = 13 (15.3%) | N = 33 (38.8%) | N = 39 (45.9%) | |||
| Comorbiditya |
4 (30.8) |
16 (48.5) |
0.447 |
25 (64.1) |
0.076 |
|
Symptoms at acute stage |
- |
- |
|
- |
- |
| Sick leave (yes) |
3 (23.1) |
17 (51.5) |
0.155 |
28 (71.8) |
0.006 |
| Duration of absence from work >4 days |
2 (15.4) |
13 (39.4) |
0.224 |
23 (59.0) |
0.016 |
| Joint swelling (yes) |
2 (15.4) |
9 (27.3) |
0.640 |
21 (53.9) |
0.036 |
| Depressed moodb |
- |
11 (33.3) |
0.045 |
19 (48.7) |
0.005 |
|
Symptoms at early chronic stage (median: 6 months after infection) |
|
|
|||
| Rheumatic symptomsc |
|
|
|
|
|
| Arthralgia |
3 (23.1) |
21 (63.6) |
0.025 |
11 (28.2) |
0.122 |
| Arthritis |
2 (15.4) |
4 (12.1) |
0.827 |
22 (56.4) |
0.004 |
| Depressed moodb | - | 11 (33.3) | 0.045 | 21 (53.8) | 0.002 |
*χ2 test of comparison between No rheumatic disorders and Arthralgia.
**χ2 test of comparison between No rheumatic disorders and Arthritis.
aHistory of at least one of the following pathologies: sprain or dislocation of joints or bones and joint diseases, before CHIK infection.
bSelf-assessed mood coded as “depressed” if checked affected or totally depressed.
cArthralgia = joint pain and/or stiffness. Arthritis = swelling in addition to joint pain and stiffness.