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Table 2 Results from Repeated Measures Models for Each Outcome with of Number of PT Visits

From: Level of participation in physical therapy or an internet-based exercise training program: associations with outcomes for patients with knee osteoarthritis

   Model without Interaction Model with Interaction
Estimate (95% CI) p-value Estimate (95% CI) p-value
WOMAC Total Score # PT visits −1.18 (−1.91, − 0.46) 0.0015 − 1.97 (− 3.14, − 0.80) < 0.01
# PT visits * time 0.10 (− 0.02, 0.21) 0.10
WOMAC Function Score # PT visits − 0.80 (− 1.33, − 0.28) 0.003 − 1.29 (− 2.17, − 0.42) <  0.01
# PT visits * time 0.06 (− 0.03, 0.15) 0.17
WOMAC Pain Score # PT visits − 0.29 (− 0.46. -0.11) 0.001 − 0.54 (− 0.80, − 0.29) < 0.01
# PT visits * time 0.03 (0.01, 0.05) < 0.01
2-Minute Step Test # PT visits 1.57 (− 0.01, 3.15) 0.05 0.99 (−1.92, 3.90) 0.50
# PT visits * time 0.08 (− 0.24, 0.40) 0.64
  1. N = 135 for WOMAC Pain and 2-min; N = 134 for WOMAC Total and Function