Table 5.
Baseline (age 25) predictors of total fat and added sugar intake at follow up (age 33 years). Multiple linear regression analyses; unstandardized (B) and standardized regression coefficients (β). The Oslo Youth Study 1991 – 1999.
| Dietary habits at follow-up Predictors | Total fat intake | Added sugar intake | ||||||
| Model 1 | Men | Women | Men | Women | ||||
| Psychosocial factors at baseline | B | β | B | β | B | β | B | β |
| Attitude | 0.25 | 0.13 | 0.06 | 0.03 | 0.25 | 0.10 | 0.03 | 0.02 |
| Subjective norm | 0.20 | 0.09 | 0.05 | 0.02 | 0.23 | 0.08 | 0.31 | 0.13* |
| Perceived behaviour control | 0.16 | 0.01 | -3.31 | -0.29*** | -1.29 | -0.08 | 0.72 | 0.06 |
| Perceived social norms | -0.34 | -0.03 | -0.15 | -0.01 | -2.20 | -0.13* | -1.83 | -0.14* |
| Intention | -1.24 | -0.21** | 0.14 | 0.02 | -0.78 | -0.10 | -0.16 | -0.03 |
| R2/R2 adjusted, % | 4.1/2.0 | 8.4/6.6 | 4.3/2.2 | 3.3/1.5 | ||||
| Model 2 | ||||||||
| Model 1 + Demographic factors at follow-up | ||||||||
| Attitude | 0.27 | 0.14 | 0.04 | 0.02 | 0.30 | 0.12 | 0.02 | 0.01 |
| Subjective norm | 0.18 | 0.08 | 0.03 | 0.02 | 0.20 | 0.07 | 0.28 | 0.12 |
| Perceived behaviour control | 0.36 | 0.03 | -3.06 | -0.27*** | -1.31 | -0.08 | 0.98 | 0.08 |
| Perceived social norms | -0.20 | -0.02 | -0.37 | -0.03 | -2.53 | -0.15* | -1.97 | -0.15* |
| Intention | -1.23 | -0.21** | 0.05 | 0.01 | -0.83 | -0.11 | -0.18 | -0.03 |
| Education | -0.43 | -0.09 | -0.27 | -0.05 | 0.28 | 0.04 | -0.41 | -0.07 |
| Household income | -0.16 | -0.04 | -0.42 | -0.12 | -0.77 | -0.15* | -0.27 | -0.07 |
| Marital status | -1.97 | -0.15 | -0.76 | -0.06 | -0.07 | -0.00 | -0.63 | -0.04 |
| Children | -0.01 | 0.00 | 0.41 | 0.04 | 0.86 | 0.11 | 0.08 | 0.01 |
| R2/R2 adjusted, % | 6.7/2.9 | 10.2/7.1 | 7.0/3.2 | 4.6/1.2 | ||||
| Model 3 | ||||||||
| Model 2 + baseline eating behaviour | ||||||||
| Attitude | 0.23 | 0.12 | 0.05 | 0.03 | 0.13 | 0.05 | -0.02 | -0.01 |
| Subjective norm | 0.17 | 0.08 | 0.03 | 0.01 | 0.07 | 0.02 | 0.16 | 0.07 |
| Perceived behaviour control | 0.41 | 0.03 | -2.91 | -0.25*** | -1.45 | -0.09 | 1.24 | 0.10 |
| Perceived social norms | -0.31 | -0.03 | -0.29 | -0.02 | -2.30 | -0.14* | -1.58 | -0.12 |
| Intention | -1.16 | -0.20* | 0.09 | 0.02 | -0.23 | -0.03 | 0.15 | 0.02 |
| Education | -0.43 | -0.09 | -0.27 | -0.05 | 0.74 | 0.12 | -0.30 | -0.05 |
| Household income | -0.19 | 0.05 | -0.37 | -0.10 | -0.89 | -0.17* | -0.26 | -0.07 |
| Marital status | -2.16 | -0.17* | -0.64 | -0.05 | -0.65 | -0.04 | -0.90 | -0.06 |
| Children | -0.06 | -0.01 | 0.22 | 0.04 | 0.42 | 0.06 | 0.0 | 0.00 |
| Baseline eating behaviour† | 0.92 | 0.12 | 0.56 | 0.07 | 3.65 | 0.35*** | 2.34 | 0.26*** |
| R2/R2 adjusted, % | 8.0/3.9 | 10.7/7.1 | 17.6/13.9 | 10.6/7.1 | ||||
Marital status is coded 1 = married, 2 = single/divorced/widow, while all other variables are coded in ascending order. † The corresponding eating behaviour in 1991: fat score in 1991 for total fat intake in 1999 (per cent of energy from total fat), sugar score in 1991 for added sugar intake in 1999 (per cent of energy from added sugar), *p < 0.05, **p < 0.01, ***p < 0.001.