Anthropometric characteristics of children living in food-insecure households in the USA.

OBJECTIVE

This study provides information on food insecurity and child malnutrition in a technologically advanced nation.

DESIGN

Population-based study using multistage probability cluster sampling design to collect survey data. Multivariable regression models were used to determine associations between food security status and various malnutrition indices.

SETTING

We used a national sample from the US National Health and Nutrition Examination Survey 2011-2014.

PARTICIPANTS

The anthropometric and demographic data sets of 4121 children <7 years old were analysed for this study.

RESULTS

Food-insecure infants younger than 6 months had shorter upper arm length (-0·4 cm, P = 0·012) and smaller mid-upper arm circumference (-0·5 cm, P = 0·004); likewise those aged 6 months-1 year had shorter upper arm length (-0·4 cm, P = 0·008), body length (-1·7 cm, P = 0·007) and lower body weight (-0·5 kg, P = 0·008). Food-insecure children younger than 2 years were more likely to be underweight (OR: 4·34; 95 % CI 1·99, 9·46) compared with their food-secure counterparts. Contrariwise, food-insecure children older than 5 years were more likely to be obese (OR: 3·12; 95 % CI 1·23, 7·96).

CONCLUSIONS

Food insecurity associates with child growth deficits in the USA. Food-insecure infants and young children are generally smaller and shorter, whereas older children are heavier than their food-secure counterparts, implying a double burden of undernutrition-overnutrition associated with child food insecurity. Child food and nutrition programmes to improve food insecurity should focus on infants and children in the transition ages.