Hypothesis
Households practising urban or peri-urban agriculture are more food secure than households that do not.
What failed
Among 208 stratified-sampled households in Tongaat, 54% of practising households consumed more than six food groups against 40% of non-practising ones, but a Mann-Whitney test found no significant difference in dietary diversity between the two groups (U = 5292, p = 0.808). Employment status, arable land access, tenure and household income were the variables significantly associated with food security.
Broken assumption
Growing food at home measurably improves a household’s dietary diversity.
Why
The authors report the difference in proportions descriptively and offer no explanation for the non-significant comparison.
From the published paper: Khumalo et al. Sustainability, 2019. ↗CC BY