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Electronic Supplementary Material Table S3. Three-level multiple linear regression models predicting intention, perceived behavioral control, behavioral automaticity, self-monitoring, action planning and coping planning.

Variable / INT / PBC / SRBAI / SM / AP / CP
Β (SE) / p value / Β (SE) / p value / Β (SE) / p value / Β (SE) / p value / Β (SE) / p value / Β (SE) / p value
Group (Ref: TAU) / 0.06 (0.12) / 0.35 / 0.12 (0.18) / 0.32 / 0.02 (0.08) / 0.38 / 0.09 (0.15) / 0.34 / 0.14 (0.13) / 0.21 / 0.14 (0.12) / 0.20
Time (Ref: baseline)
6 months / 0.06 (0.04) / 0.13 / 0.06 (0.04) / 0.11 / 0.04 (0.04) / 0.22 / 0.02 (0.02) / 0.24 / 0.01 (0.03) / 0.37 / 0.02 (0.05) / 0.37
12 months / 0.03 (0.03) / 0.30 / 0.08 (0.02) / <0.01 / 0.04 (0.03) / 0.15 / 0.06 (0.05) / 0.21 / 0.04 (0.05) / 0.28 / 0.05 (0.04) / 0.21
18 months / 0.02 (0.03) / 0.34 / 0.10 (0.04) / 0.01 / 0.09 (0.04) / 0.051 / 0.08 (0.04) / 0.049 / 0.06 (0.05) / 0.18 / 0.07 (0.08) / 0.28
group × time
EXP vs. TAU at 6 months / 0.61 (0.05) / <0.01 / 0.58 (0.05) / <0.01 / 0.57 (0.05) / <0.01 / 0.54 (0.06) / <0.01 / 0.84 (0.06) / <0.01 / 0.85 (0.07) / <0.01
EXP vs. TAU at 12 months / 0.61 (0.06) / <0.01 / 0.57 (0.06) / <0.01 / 0.47 (0.06) / <0.01 / 0.54 (0.06) / <0.01 / 0.87 (0.07) / <0.01 / 0.87 (0.06) / <0.01
EXP vs. TAU at 18 months / 0.63 (0.05) / <0.01 / 0.61 (0.06) / <0.01 / 0.50 (0.06) / <0.01 / 0.58 (0.06) / <0.01 / 0.93 (0.07) / <0.01 / 0.95 (0.08) / <0.01
Age / -0.03 (0.02) / <0.01 / 0.01 (0.03) / 0.38 / 0.03 (0.03) / 0.25 / -0.04 (0.02) / 0.07 / -0.02 (0.03) / 0.28 / -0.03 (0.03) / 0.27
Sex (Ref: females) / -0.11 (0.09) / 0.17 / 0.21 (0.20) / 0.23 / 0.03 (0.02) / 0.14 / -0.28 (0.15) / 0.07 / -0.17 (0.10) / 0.09 / -0.16 (0.09) / 0.09
Charlson comorbidity index / -0.35 (0.12) / <0.01 / -0.30 (0.08) / <0.01 / -0.09 (0.02) / <0.01 / -0.20 (0.10) / 0.06 / -0.47 (0.13) / <0.01 / -0.46 (0.14) / <0.01
Body mass index / 0.05 (0.08) / 0.34 / -0.054 (0.10) / 0.59 / -0.03 (0.05) / 0.34 / -0.01 (0.07) / 0.39 / -0.05 (0.09) / 0.33 / -0.05 (0.93) / 0.40
Intercept / 3.27 (0.42) / <0.01 / 2.49 (0.52) / <0.01 / 2.20 (0.49) / <0.01 / 2.86 (0.38) / <0.01 / 2.60 (0.47) / <0.01 / 2.37 (0.49) / <0.01
(patients) / 0.50 (0.03) / <0.01 / 0.67 (0.04) / <0.01 / 0.61 (0.04) / <0.01 / 0.30 (0.02) / <0.01 / 0.58 (0.04) / <0.01 / 0.58 (0.04) / <0.01
(centers) / 0.06 (0.02) / 0.02 / 0.22 (0.07) / <0.01 / 0.17 (0.05) / <0.01 / 0.13 (0.04) / <0.01 / 0.09 (0.03) / 0.01 / 0.09 (0.03) / 0.01

Note.Ref. = reference group for comparison; TAU=treatment as usual group; EXP= intervention group; INT = intention. PBC = Perceived behavioral control; SRBAI = Self-report Behavioral Automaticity Index; SM = Self-monitoring; AP = Action planning; CP = Coping planning; = the variance at patient level; = the variance at center level; SE = standard error.

p-values< 0.05 are in bold