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

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

	PT Intervention						IBET Intervention
	Bivariate Analysis			Multivariable Analysis			Bivariate Analysis^a
	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

BMI Body Mass Index
Missing data: race information was missing in 2 participants, Western Ontario and McMasters Universities Osteoarthritis Index (WOMAC) was missing in 2 participants
^aNote: multivariable model is not applicable for the IBET intervention group based on the bivariate results

ISSN: 1471-2474