| Author/year | Aim | Participants | Design/Measures | Intervention | Results |
| Teasdale et al. (2016; 2019) | Assess the efficacy and acceptability of nutritional intervention early in FEP and evaluate the effectiveness of early dietary intervention on key nutritional end points | Twenty-seven participants were recruited from a community-based network primarily targeting young people 15 - 25 years of age with newly diagnosed FEP | No control group. Dietary Questionnaire for Epidemiological Studies (DQES), Australian Recommended Food Score (ARFS), discretionary food intake was measured by daily intake (g) | In a 12-week intervention, individual dietetic consultations and practical group sessions were offered as part of a broader lifestyle programme. Participants also had the opportunity to take part in a weekly sports group and had access to an on-site gym supervised by an exercise physiologist | 18 (67%) completed the programme. Discretionary food consumption (−47%), daily energy intake (−24%) and Na (−26%) were reduced. Quality of diets improved significantly, although this result was not significant after Bonferroni correction. The principal factor contributing to improved diet quality was increased vegetable intake. Sustained efficacy of dietary intervention at 2 year follow-up. Disposable food consumption was 40% lower and no rise in weight or waist-circumference |