Table 3.

Estimates of linear mixed model over 20 days for flossing and flossing Intentions as a function of intervention (N =112)

Model parameters for flossing				95 % CI
Fixed effects (intercept, slopes)	Estimate (SE)	t	p	Lower Bound	Upper Bound
Intercept	1.02 (0.13)	8.04	<0.01	0.08	1.27
Group	0.87 (0.18)	4.84	<0.01	0.52	1.23
Time	−0.02 (0.13)	−0.14	0.89	−0.27	0.24
Group x Time	−0.76 (0.18)	−4.15	<0.01	−1.13	−0.40
Estimates of covariance parameters for flossing		Wald’s z
Repeated Measures Var1	0.04 (0.13)	0.28	0.78	0.00	38.06
Repeated measures Var2	0.35 (0.14)	2.56	0.01	0.17	0.76
Intercept + time (subjects)	0.28 (0.08)	3.71	<0.01	0.16	0.47
Model parameters for intentions				95 % CI
Fixed effects (intercept, slopes)	Estimate (SE)	t	p	Lower Bound	Upper Bound
Intercept	1.12 (0.16)	7.09	<0.01	0.80	1.43
Group	1.04 (0.22)	4.70	<0.01	0.60	1.47
Time	−0.38 (0.18)	−2.19	0.03	−0.73	−0.04
Gender	0.77 (0.26)	2.98	0.003	0.26	1.28
Group x Time	−0.56 (0.23)	−2.44	0.02	−1.02	−0.11
Group x Gender	−0.93 (0.28)	−3.37	<0.01	−1.48	−0.38
Time x Gender	0.06 (0.25)	0.23	0.82	−0.43	0.54
Estimates of covariance parameters for intentions		Wald’s z
Repeated Measures Var1	0.36 (0.17)	2.16	0.03	0.15	0.90
Repeated measures Var2	0.84 (0.20)	4.28	<0.01	0.53	1.33
Intercept + time (subjects)	0.14 (0.08)	1.68	0.09	0.04	0.44

All p values are two-tailed except in the case of variances, where one-tailed p-values are used (because variances are constrained to be non-negative). Time is coded 0 = baseline, 1 = follow-up. Group is coded 0 for the control group and 1 for the treatment group