Table 3.

Associations between fatigue trajectories and patient characteristics: multinomial regression. The high fatigue group is the reference group. The number of cases used in the analysis is 870.

Predictors	Low Fatigue Group OR (95% CI)	Low-to-high Fatigue Group OR (95% CI)
Age, yrs	1.04 (0.98–1.04)	1.03 (0.90–1.17)
Sex	0.47 (0.22–1.00)^*	1.24 (0.82–1.87)
Medication use	0.25 (0.14–0.43)^**	0.67 (0.22–2.02)
Comorbidity	0.33 (0.19–0.59)^**	0.25 (0.07–0.96)^*
OA severity	0.87 (0.49–1.53)	0.88 (0.24–3.21)

↵* p < 0.05.
↵** p < 0.01. Sex: male (level 0), female (level 1); medication use: no (level 0), yes (level 1); comorbidity: no (level 0), yes (level 1); OA severity: no (level 0), yes (level 1); OA: osteoarthritis.