Table 3.
Comparison of cytokine concentrations between groups.
| Variable | Group | Mean | SD | Median | Quartile 1 | Quartile 3 | N | P |
|---|---|---|---|---|---|---|---|---|
| TNFα (pg/mL) | Healthy | 1.40 | 1.02 | 1.29 | 0.0 | 2.8 | 48 | 0.457 |
| Knee OA | 2.20 | 4.52 | 1.30 | 1.1 | 1.5 | 53 | ||
| All | 1.82 | 3.36 | 1.26 | 0.0 | 24.2 | 101 | ||
|
| ||||||||
| IL-10 (pg/mL) | Healthy | 0.89 | 0.87 | 1.30 | 0.0 | 2.3 | 48 | 0.030 |
| Knee OA | 1.58 | 2.36 | 1.17 | 0.0 | 1.2 | 53 | ||
| All | 1.25 | 1.84 | 1.09 | 0.0 | 15.7 | 101 | ||
|
| ||||||||
| IL-6 (pg/mL) | Healthy | 2.55 | 1.06 | 2.9 | 2.3 | 4.0 | 48 | 0.031 |
| Knee OA | 4.38 | 4.61 | 2.4 | 1.7 | 3.1 | 53 | ||
| All | 3.48 | 3.53 | 2.50 | 1.2 | 19.3 | 101 | ||
|
| ||||||||
| IL-8 (pg/mL) | Healthy | 9.72 | 5.28 | 8.80 | 5.4 | 16.0 | 48 | 0.984 |
| Knee OA | 10.56 | 8.51 | 9.00 | 6.2 | 12.7 | 53 | ||
| All | 10.16 | 7.14 | 8.83 | 0.0 | 53.5 | 101 | ||
OA: osteoarthritis; Healthy: healthy control; IL: interleukin; TNF: tumor necrosis factor; SD: standard deviation; N: number of subjects; P: probability.