Inverted Rearfoot posture in subjects with coexisting patellofemoral osteoarthritis in medial knee osteoarthritis: an exploratory study

Table 1 Patients’ characteristics at follow up period (n = 68)^a

Age, years	74.69 ± 7.785
Female, no. (%)	51 (75.0)
Body mass index, kg/m²	24.14 ± 3.753
Corrected anatomical axis angle, degrees	176.2 ± 4.951
Presence of varus alignment, no. (%)^a	55 (80.9)
Medial tibiofemoral joint K/L grade, no. (%)^b
Grade 2	48 (70.6)
Grade 3	11 (16.2)
Grade 4	9 (13.2)
Presence of varus thrust, no. (%)	12 (17.6)
Knee range of motion, degrees
Extension^c	−6.471 ± 6.482
Flexion	140.8 ± 12.17
Presence of any PFOA, no. (%)	38 (55.9)
Presence of mixed PFOA, no. (%)	19 (27.9)
Presence of medial PFOA, no. (%)	22 (68.8)
Presence of lateral PFOA, no. (%)	26 (32.4)
Coexisting medial TFOA and any PFOA, no. (%)	38 (55.9)
Calcaneus inverted angle, degrees^d	−0.357 ± 5.522

K/L grade: Kellgren/Lawrence grade; PFOA: patellofemoral osteoarthritis; TFOA: tibiofemoral osteoarthritis
Except where otherwise indicated, values are mean ± SD
^aVarus alignment is defined as corrected anatomical axis angle < 179 degrees
^bIf participants did not get worse their clinical symptoms within the 12-month follow-up period, radiography at baseline was used for K/L grade assessment
^cA negative value indicates that the knee is flexed
^dA positive value indicates inversion direction of the calcaneus

ISSN: 1757-1146