Heightened Nutritional Vulnerability Among Food-insecure Canadians in 2015 Than 2004 (P04-053-19)
Bibliographic record
Abstract
Household food insecurity is a persistent public health issue in Canada. Analyses of dietary intake data from the 2004 Canadian Community Health Survey (CCHS) showed heightened nutritional vulnerability among adults and, to a lesser degree, children in food-insecure households. Given the rise in food prices since 2004, people in food-insecure households may now be at heightened nutritional risk. The objective of this study is to determine how nutritional vulnerability associated with household food insecurity has changed between 2004 and 2015. Dietary intake was assessed on the 2004 CCHS Nutrition (n = 35,107) and 2015 CCHS Nutrition (n = 20,487) using 24-hour recalls, with household food insecurity assessed using the Household Food Security Survey Module. The National Cancer Institute method was used to estimate usual intakes of nutrients of public health concern (calcium, magnesium, vitamin A, vitamin C, folate, zinc, potassium) for food-insecure participants, by survey year, considering children 1–8 years (yr) and 9–18 yr and male and female adults, 19–64 yr. Prevalence of nutrient inadequacy was assessed using the EAR cut-point approach. Differences in usual intake and prevalence of inadequacy between surveys were assessed using t-tests. Weighted bootstrap technique was utilised to generate variance estimates. In 2004 and 2015, 8.4% of individuals lived in moderately or severely food-insecure households. Mean usual intakes were lower and prevalence of nutrient inadequacy were higher across groups in 2015 than 2004, but not all differences were statistically significant. Differences in mean potassium and vitamin C intakes were significant in all groups; differences for folate and magnesium were significant in all groups except older children. Calcium was significantly lower in all groups except adult males, and vitamin A was significantly lower in all groups except young children. Young children had significantly lower intakes of zinc. Older children and male adults had significantly higher prevalence of inadequacy for vitamin C. Nutritional vulnerability associated with household food insecurity has worsened over time in Canada and remains an area in need of intervention. Ontario Graduate Scholarship, Canada Graduate Scholarship-Masters, Canadian Institutes of Health Research.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.005 |
| Science and technology studies | 0.006 | 0.000 |
| Scholarly communication | 0.002 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".