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Table 4 Results from Models for Associations of Number of PT Sessions Attended and Number of Days on the Website for IBET Intervention with Participant Characteristics

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

  PT Intervention IBET Intervention
Bivariate Analysis Multivariable Analysis Bivariate Analysisa
Estimate 95% CI p-value Estimate 95% CI p-value Estimate 95% CI p-value
Age (per 10 years) 0.12 0.05, 0.19 < 0.01 0.10 0.02–0.17 0.01 0.16 −0.07, 0.40 0.12
Female 0.02 −0.14, 0.18 0.82 0.11 −0.45, 0.67 0.69
Nonwhite race 0.28 0.09, 0.47 < 0.01 0.18 −0.04 – 0.41 0.11 0.27 −0.27, 0.81 0.32
Bachelors’ Degree or Post-Graduate Work −0.04 −0.20, 0.11 0.57 −0.30 − 0.82, 0.22 0.26
Employed 0.03 −0.11, 0.18 0.66 0.04 −0.49, 0.57 0.88
Fair or Poor Self-Rated Health 0.38 0.09, 0.67 0.01 0.24 −0.08 – 0.56 0.13 0.12 −0.59, 0.82 0.75
BMI, kg/m2 −0.007 −0.02, 0.002 0.11 0.002 −0.01, 0.01 0.69 −0.02 −0.05, 0.02 0.30
WOMAC Pain Subscale −0.0176 - 0.040, 0.005 0.12 0.004 −0.02, 0.03 0.77 −0.03 −0.10, 0.04 0.48
WOMAC Function Subscale −0.003 −0.009, 0.002 0.26     −0.01 −0.03, 0.01 0.16
2-Minute Step −0.001 − 0.003, 0.002 0.66 0.02 −0.004, 0.02 0.23
Social Support for Exercise −0.003 −0.01, 0.002 0.24 0.003 −0.01, 0.02 0.72
Self-Efficacy for Exercise 0.004 0.00, 0.01 0.03 0.003 −0.001 – 0.01 0.11 0.01 −0.005, 0.02 0.23
Comfort with Internet Use −0.03 −0.56, 0.49 0.90
  1. BMI Body Mass Index
  2. Missing data: race information was missing in 2 participants, Western Ontario and McMasters Universities Osteoarthritis Index (WOMAC) was missing in 2 participants
  3. aNote: multivariable model is not applicable for the IBET intervention group based on the bivariate results