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Table 1 Participant characteristics. Values are mean (SD) unless otherwise stated

From: Associations of foot and ankle characteristics with knee symptoms and function in individuals with patellofemoral osteoarthritis

Participant characteristics
 Age, years 59.9 (7.1)
 Number of females † 126 (67)
 BMI (kg/m2) 29.3 (5.6)
 Pain duration (years) 7.0 (8.5)
 Study knee, left/right † 75 (39.9) / 113 (60.1)
 History of knee injury (study limb) † 55 (29.3)
 History of surgery (study limb) † 35 (18.6)
Foot and ankle characteristics
 WB ankle dorsiflexion ROM (study limb), cm 9.2 (6.7)
 WB ankle dorsiflexion ROM (non-study limb), cm 10.1 (9.4)
 FPI (study limb) ^ 3.5 (−5 to 10)
 FPI (non-study limb) ^ 3.5 (−3 to 10)
 Arch height difference (study limb), mm 12.8 (4.7)
 Midfoot width difference (study limb), mm 6.3 (4.4)
 Foot mobility magnitude (study limb), mm 14.8 (4.9)
Knee pain provocation tests
 Number of repeated single step-ups 8.6 (9.2)
 Number of repeated double-leg sit-to-stand 9.3 (9.8)
Patient-reported measures of knee symptoms and function
 Average knee pain, mm 41.1 (22.1)
 Worst knee pain, mm 55.7 (25.9)
 Maximum knee pain during stair ambulation, mm 54.6 (25.0)
 Maximum knee pain during squatting, mm 59.8 (27.4)
 Maximum knee pain rising from sitting, mm 42.7 (25.3)
 AKPS 59.7 (14.1)
 KOOS-symptoms 45.3 (20.2)
 KOOS-pain 44.7 (19.0)
 KOOS-ADL 42.7 (24.4)
 KOOS-sport/rec 48.6 (23.9)
 KOOS-QoL 47.2 (20.1)
 KOOS-PF 46.0 (20.6)
  1. † Data presented as n (%)
  2. ^ Data presented as n (range)
  3. WB: weightbearing; ROM: range of motion; FPI: Foot Posture Index (supinated = 0 to -10; neutral = +1 to + 7; pronated = + 8 to +10) mm: millimetres (0 = no pain; 100 = worst pain possible); AKPS: Anterior Knee Pain Scale (0 = maximum disability; 100 = no disability) KOOS: Knee injury and Osteoarthritis Outcome Score (0 = extreme knee problems; 100 = no knee problems); ADL: activities of daily living; sport/rec: sport and recreation; QoL: quality of life; PF: patellofemoral