Table 3. Psychological variables at baseline and 12 months.
Control (n = 129) | Intervention (n = 124) | Between-group differences | ||||
---|---|---|---|---|---|---|
Variable | Baseline | 12 mo | Baseline | 12 mo | Mean diff | 95% CI |
Satisfaction with weight outcomes (1–5) | 4.0 (1.2) | 2.7 (1.4) | 4.0 (1.1) | 3.2 (1.5) | −0.65 | −1.0 to −0.3* |
Healthy eating self-efficacy (1–4) | 2.8 (0.6) | 2.6 (0.7) | 2.9 (0.6) | 2.9 (0.7) | −0.30 | −0.48 to −0.15* |
Physical activity self-efficacy (1–4) | 2.9 (0.8) | 2.8 (0.8) | 3.0 (0.7) | 2.9 (0.7) | −0.09 | −0.25 to 0.07 |
Healthy eating perceived behavioural control (1–7) | 5.1 (1.2) | 4.9 (1.4) | 5.5 (1.2) | 5.5 (1.4) | −0.46 | −0.77 to −0.15* |
Physical activity perceived behavioural control (1–7) | 4.6 (1.5) | 4.6 (1.7) | 4.7 (1.5) | 4.7 (1.8) | −0.17 | −0.55 to 0.25* |
Weight loss confidence (1–7) | 5.2 (1.3) | 4.3 (1.6) | 5.5 (1.3) | 5.0 (1.7) | −0.59 | −0.99 to −0.18* |
WLM confidence (1–7) | 4.2 (1.6) | 4.1 (1.7) | 4.3 (1.5) | 5.2 (1.7) | −1.10 | −1.49 to −0.68* |
Action planning (healthy eating; 1–4) | 3.1 (0.9) | 2.9 (1.0) | 3.3 (0.7) | 3.1 (0.9) | −0.24 | −0.48 to −0.01* |
Coping planning (healthy eating; 1–4) | 2.6 (0.9) | 2.5 (1.0) | 2.8 (0.9) | 2.8 (0.9) | −0.32 | −0.52 to −0.11 |
Action planning (physical activity; 1–4) | 2.7 (1.1) | 2.1 (1.0) | 2.9 (1.0) | 2.4 (1.0) | −0.25 | −0.49 to −0.02* |
Coping planning (physical activity; 1–4) | 2.2 (0.9) | 2.1 (1.0) | 2.2 (1.0) | 2.4 (1.0) | −0.28 | −0.50 to −0.05 |
Automaticity (healthy eating; 1–4) | 2.6 (0.8) | 2.7 (0.9) | 2.7 (0.8) | 3.0 (0.8) | −0.21 | −0.39 to −0.02 |
Automaticity (physical activity; 1–4) | 2.4 (0.9) | 2.4 (1.0) | 2.4 (0.9) | 2.7 (0.9) | −0.19 | −0.39 to 0.01 |
Automaticity (self-weighing; 1–4) | 2.7 (1.0) | 2.7 (1.0) | 2.7 (1.1) | 3.1 (1.0) | −0.43 | −0.64 to −0.19* |
Regulatory focus (promotion; 6–30) | 20.7 (3.3) | 20.7 (3.6) | 21.4 (3.4) | 20.9 (3.3) | 0.12 | −0.57 to 0.86* |
Regulatory focus (prevention; 5–25) | 17.5 (3.8) | 17.7 (4.0) | 17.2 (3.8) | 17.3 (3.6) | 0.04 | −0.58 to 0.69* |
Ego depletion (12–60) | 31.3 (9.0) | 34.2 (9.4) | 29.9 (8.4) | 32.1 (10.0) | 1.54 | −0.53 to 3.60 |
Social support (6–36) | 24.6 (5.4) | 24.0 (5.9) | 25.5 (4.5) | 24.5 (5.8) | −0.31 | −1.46 to 0.85* |
Values are mean (SD). Between-group comparisons were carried out using multiple regression analyses, adjusted for baseline, stratification variables, and index of multiple deprivation. Boldface indicates statistical significance.
*As the residuals were non-normally distributed, this is a bias-corrected and accelerated CI obtained using bootstrapping.
Abbreviation: CI, confidence interval; WLM, weight loss maintenance.