Summary Background Healthy dietary patterns are a global priority to reduce non-communicable diseases. Yet neither worldwide patterns of diets nor their trends with time are well established. We ...aimed to characterise global changes (or trends) in dietary patterns nationally and regionally and to assess heterogeneity by age, sex, national income, and type of dietary pattern. Methods In this systematic assessment, we evaluated global consumption of key dietary items (foods and nutrients) by region, nation, age, and sex in 1990 and 2010. Consumption data were evaluated from 325 surveys (71·7% nationally representative) covering 88·7% of the global adult population. Two types of dietary pattern were assessed: one reflecting greater consumption of ten healthy dietary items and the other based on lesser consumption of seven unhealthy dietary items. The mean intakes of each dietary factor were divided into quintiles, and each quintile was assigned an ordinal score, with higher scores being equivalent to healthier diets (range 0–100). The dietary patterns were assessed by hierarchical linear regression including country, age, sex, national income, and time as exploratory variables. Findings From 1990 to 2010, diets based on healthy items improved globally (by 2·2 points, 95% uncertainty interval (UI) 0·9 to 3·5), whereas diets based on unhealthy items worsened (−2·5, −3·3 to −1·7). In 2010, the global mean scores were 44·0 (SD 10·5) for the healthy pattern and 52·1 (18·6) for the unhealthy pattern, with weak intercorrelation ( r =–0·08) between countries. On average, better diets were seen in older adults compared with younger adults, and in women compared with men (p<0·0001 each). Compared with low-income nations, high-income nations had better diets based on healthy items (+2·5 points, 95% UI 0·3 to 4·1), but substantially poorer diets based on unhealthy items (−33·0, −37·8 to −28·3). Diets and their trends were very heterogeneous across the world regions. For example, both types of dietary patterns improved in high-income countries, but worsened in some low-income countries in Africa and Asia. Middle-income countries showed the largest improvement in dietary patterns based on healthy items, but the largest deterioration in dietary patterns based on unhealthy items. Interpretation Consumption of healthy items improved, while consumption of unhealthy items worsened across the world, with heterogeneity across regions and countries. These global data provide the best estimates to date of nutrition transitions across the world and inform policies and priorities for reducing the health and economic burdens of poor diet quality. Funding The Bill & Melinda Gates Foundation and Medical Research Council.
The workplace offers a unique opportunity for effective health promotion. We aimed to comprehensively study the effectiveness of multicomponent worksite wellness programmes for improving diet and ...cardiometabolic risk factors.
We did a systematic literature review and meta-analysis, following PRISMA guidelines. We searched PubMed-MEDLINE, Embase, the Cochrane Library, Web of Science, and Education Resources Information Center, from Jan 1, 1990, to June 30, 2020, for studies with controlled evaluation designs that assessed multicomponent workplace wellness programmes. Investigators independently appraised the evidence and extracted the data. Outcomes were dietary factors, anthropometric measures, and cardiometabolic risk factors. Pooled effects were calculated by inverse-variance random-effects meta-analysis. Potential sources of heterogeneity and study biases were evaluated.
From 10 169 abstracts reviewed, 121 studies (82 68% randomised controlled trials and 39 32% quasi-experimental interventions) met the eligibility criteria. Most studies were done in North America (57 47%), and Europe, Australia, or New Zealand (36 30%). The median number of participants was 413·0 (IQR 124·0–904·0), and median duration of intervention was 9·0 months (4·5–18·0). Workplace wellness programmes improved fruit and vegetable consumption (0·27 servings per day 95% CI 0·16 to 0·37), fruit consumption (0·20 servings per day 0·11 to 0·28), body-mass index (–0·22 kg/m2 –0·28 to –0·17), waist circumference (–1·47 cm –1·96 to –0·98), systolic blood pressure (–2·03 mm Hg –3·16 to –0·89), and LDL cholesterol (–5·18 mg/dL –7·83 to –2·53), and to a lesser extent improved total fat intake (–1·18% of daily energy intake –1·78 to –0·58), saturated fat intake (–0·70% of daily energy –1·22 to –0·18), bodyweight (–0·92 kg –1·11 to –0·72), diastolic blood pressure (–1·11 mm Hg –1·78 to –0·44), fasting blood glucose (–1·81 mg/dL –3·33 to –0·28), HDL cholesterol (1·11 mg/dL 0·48 to 1·74), and triglycerides (–5·38 mg/dL –9·18 to –1·59). No significant benefits were observed for intake of vegetables (0·03 servings per day 95% CI –0·04 to 0·10), fibre (0·26 g per day –0·15 to 0·67), polyunsaturated fat (–0·23% of daily energy –0·59 to 0·13), or for body fat (–0·80% –1·80 to 0·21), waist-to-hip ratio (–0·00 ratio –0·01 to 0·00), or lean mass (1·01 kg –0·82 to 2·83). Heterogeneity values ranged from 46·9% to 91·5%. Between-study differences in outcomes were not significantly explained by study design, location, population, or similar factors in heterogeneity analyses.
Workplace wellness programmes are associated with improvements in specific dietary, anthropometric, and cardiometabolic risk indicators. The heterogeneity identified in study designs and results should be considered when using these programmes as strategies to improve cardiometabolic health.
National Heart, Lung, and Blood Institute.
PDF
