Table 3.
Results of univariate and multivariable regression analyses for dietary adherence score.
| Univariate Model | Multivariable Regression Model ! | |||
|---|---|---|---|---|
| β | 95%CI | β | 95%CI | |
| Changes in psychological variables | ||||
| Nutrition knowledge score | 0.32 | [−0.03, 0.66] | 0.57 ** | [0.16, 0.98] |
| Diet self-efficacy (SRAHP-Nutrition subscale) | 0.02 | [−0.31, 0.36] | −0.09 | [−0.50, 0.32] |
| Autonomous motivation for healthy diet (TSRQ-autonomous subscale) | 0.16 | [−0.04, 0.37] | 0.10 | [−0.13, 0.33] |
| Controlled motivation for healthy diet (TSRQ-controlled subscale) | −0.07 | [−0.25, 0.12] | −0.09 | [−0.29, 0.10] |
| $,! Diet motivation to improve body image (Ref: No change/decreased) | ||||
| Low to high | −1.23 | [−4.89, 2.40] | −1.14 | [−4.87, 2.59] |
| Stage of change for healthy diet (Ref: +1 stage or below) | ||||
| +2 stages or more | 2.16 * | [0.15, 4.17] | 2.59 * | [0.42, 4.76] |
| Baseline psychological variables | ||||
| Nutrition knowledge score | 0.18 | [−0.14, 0.51] | 0.50 * | [0.12, 0.87] |
| Diet self-efficacy (SRAHP-Nutrition subscale) | 0.22 | [−0.07, 0.51] | −0.04 | [−0.40, 0.32] |
| Autonomous motivation for healthy diet (TSRQ-autonomous subscale) | −0.10 | [−0.30, 0.10] | 0.06 | [−0.17, 0.29] |
| Controlled motivation for healthy diet (TSRQ-controlled subscale) | 0.00 | [−0.16, 0.16] | −0.02 | [−0.21, 0.16] |
| $,! Diet motivation to improve body image (Ref: low) | ||||
| High | −2.27 * | [−4.40, −0.15] | −2.07 | [−4.37, 0.24] |
| Stage of change for healthy diet (Ref: Contemplation/Pre-contemplation) | ||||
| Determination | −0.48 | [−2.67, 1.71] | 0.15 | [−1.91, 2.21] |
| Action/Maintenance | 2.34 | [−0.62, 5.31] | 3.95 * | [0.88, 7.03] |
| Covariates | ||||
| Married (Ref: Not married) | 1.67 | [−0.36, 3.69] | 2.41 * | [0.33, 4.49] |
| Full time work (Ref: Not full time) | −4.30 ** | [−6.85, −1.75] | −3.19 * | [−5.67, −0.72] |
| Eating out frequency at 10 months (Ref: ≤3 times a week) | ||||
| 4–6 times a week | −2.88 * | [−5.38, −0.38] | −1.96 | [−4.34, 0.42] |
| At least once a day | −2.35 | [−4.78, 0.70] | −1.22 | [−3.54, 1.10] |
| Jointed CNSLMP before (Ref: No) | 1.96 | [−0.60, 4.51] | 2.11 | [−0.31, 4.53] |
| Total number of nutrition consultations attended (Ref: <10) | ||||
| 10−16 | 2.60 * | [0.24, 4.96] | 2.63 * | [0.42, 4.84] |
| 17−34 | 3.52 ** | [1.08, 5.97] | 2.48 * | [0.08, 4.87] |
| R2 | 0.36 | |||
| F | 3.30 *** | |||
N = 140. CI: Confidence Interval; SRAHP: Self Rated Abilities for Health Practices Scale; TSRQ: Treatment Self-Regulation Questionnaire; $ Diet motivation to improve body image score: Low < 6, High ≥ 6; ! N = 139, different sample sizes due to missing data. * p < 0.05; ** p < 0.01, *** p < 0.001.