Objective: This study examined KOA and non-KOA individuals to find out if there is an association between KOA and sagittal pelvic inclinations, frontal knee alignment, and foot posture.
Methods: Fifty-two subjects were allocated to two groups, group A (mild, moderate KOA) and group B (without KOA), based on the diagnostic criteria, both between 40-55 years with a BMI of 25–29.9 kg/m2. Knee pain and function were assessed by the WOMAC. The sagittal pelvic angle (PA), the femoro-tibial angle (FTA), and the rear foot angle (RFA) were measured by AutoCAD software, while the foot posture was assessed by the navicular drop (ND) test and the intrinsic foot muscle strength (IFMS) test.
Results: KOA was found to have a moderately significant negative correlation with all FTA (r = -0.376; p = 0.006), PA (r = -0.376; p = 0.006), and IFMS (r = -0.317; p = 0.022). Moreover, although not statistically significant, a weak positive correlation between KOA, RFA (r = 0.235; p = 0.093), and ND (r = 0.081; p = 0.568) was found. KOA and WOMAC had a strong positive and significant correlation (r = 0.912; p = 0.001).
Conclusion: In patients with mild to moderate KOA, knee varus alignment, posterior pelvic tilt, and pronated foot posture have all been reported.