Table 4.

Changes in intervention outcomes by class size and participant characteristics

	β	t	p	Adj. R2
Unhealthy physical days				0.458
Baseline score	−0.69	−30.98	<0.001
8 to 12 participants	1.00	–	–
1 to 7 participants	−0.01	−0.54	0.587
13 to 20 participants	−0.01	−0.44	0.659
21 to 42 participants	0.02	0.70	0.487
Age	0.03	1.25	0.212
Sex	−0.01	−0.46	0.644
Race/ethnicity	−0.02	−0.95	0.341
Number of chronic conditions	0.07	3.08	0.002
Living situation	0.02	0.75	0.452
Days physically active				0.296
Baseline score	−0.55	−21.95	<0.001
8 to 12 participants	1.00	–	–
1 to 7 participants	−0.01	−0.31	0.757
13 to 20 participants	0.00	0.09	0.925
21 to 42 participants	0.00	0.12	0.902
Age	0.00	−0.16	0.877
Sex	0.00	−0.14	0.889
Race/ethnicity	0.05	1.86	0.064
Number of chronic conditions	−0.07	−2.74	0.006
Living situation	−0.01	−0.46	0.646
Falls efficacy scale				0.496
Baseline score	−0.72	−33.17	<0.001
8 to 12 participants	1.00	–	–
1 to 7 participants	−0.03	−1.14	0.256
13 to 20 participants	0.00	0.04	0.970
21 to 42 participants	0.03	1.15	0.249
Age	−0.17	−7.67	<0.001
Sex	0.01	0.60	0.547
Race/ethnicity	0.02	1.11	0.266
Number of chronic conditions	−0.02	−1.15	0.252
Living situation	0.03	1.17	0.244
Days limited usual activity				0.468
Baseline score	−0.69	−32.19	<0.001
8 to 12 participants	1.00	–	–
1 to 7 participants	−0.01	−0.34	0.735
13 to 20 participants	0.03	1.07	0.283
21 to 42 participants	−0.01	−0.45	0.650
Age	0.00	−0.19	0.847
Sex	−0.03	−1.26	0.207
Race/ethnicity	0.03	1.18	0.239
Number of chronic conditions	0.07	3.09	0.002
Living situation	0.00	0.09	0.931

Statistical significance p = 0.0125 applying the Bonferroni correction for four independent analyses. Among successful completers, class sizes are compared with the referent group of sessions with eight to 12 participants