Skip to main content

Table 1 Eligibility criteria for the two PFP cohorts

From: Age-related differences in foot mobility in individuals with patellofemoral pain

  Collins et al. [8] (n = 110) Observational cohort [9] (n = 84)
Inclusion criteria
 Age 18–40 years 18–50 years
 Symptoms Insidious onset anterior knee or retro-patellar pain, aggravated by at least 2 of the following activities: prolonged sitting or kneeling, squatting, running, hopping, stair ambulation Anterior or retro-patellar knee pain aggravated by at least 2 patellofemoral joint loading activities (e.g. stair ambulation, squatting, rising from sitting) on most days during the past month
Tenderness on patellar palpation, or pain with step-down/double-leg squat  
 Pain severity Worst pain over the preceding week ≥30 mm on a 100 mm VAS ≥30 mm on a 100 mm VAS during aggravating activities
 Duration of PFP ≥ 6 weeks ≥ 3 months
Exclusion criteria
 Other injury or surgery Concomitant injury/pain from the lumbar spine, hip or other knee structures Concomitant pain from the lumbar spine, hip or other knee structures
Previous knee surgery Planned or previous knee surgery
Patellofemoral instability Moderate to severe concomitant TFJ OA (KL grade > 3 on AP radiograph)
Knee joint effusion  
Foot conditions precluding foot orthoses use  
 Interventions Physical therapy or foot orthoses (previous 12 months) Knee injections (previous 3 months)
Anti-inflammatory drugs  
 Other Strapping tape allergy Contraindications to x-ray (e.g. pregnancy, breastfeeding)
Unable to understand written/spoken English Unable to understand written/spoken English
  Physically unable to undertake testing procedures
  1. PFP patellofemoral pain, VAS visual analogue scale, TFJ tibiofemoral joint, OA osteoarthritis, KL Kellgren-Lawrence, AP anteroposterior