Table 1.
Comparisons of demographic characteristics in different study groups. The table illustrates that there was a statistically significant difference with a p-value < 0.05 between the study groups as regards age, with a lower mean age among the RA group. On the other hand, there was no statistically significant difference with p-value > 0.05 as regards sex distribution among groups.
| Variables | OA (n = 40) | RA (n = 40) | HCs (n = 40) | p-Value |
|---|---|---|---|---|
| Mean ± SD | Mean ± SD | Mean ± SD | ||
| Age (year) | 53.5 ± 6.7 | 38.4 ± 10.1 | 52.8 ± 8.4 | <0.001 * |
| Sex | ||||
| Male | 10 (25%) | 5 (12.5%) | 7 (17.5%) | 0.4 |
| Female | 30 (75%) | 35 (87.5%) | 33 (82.5%) | |
(*) indicates that significant difference is present.