Background
There are currently no national standards for school lunch period lengths and little is known about the association between the amount of time students have to eat and school food selection and consumption.
Objectives
To examine plate waste measurements from students in the control arm from the MEALS study (2011-2012 school year) for the association of the amount of time to eat with school meal selection and consumption.
Design
Prospective study using up to six repeated measures among students over the school year.
Participants/Setting
1001 students in grades 3-8 attending 6 participating elementary/middle schools in an urban, low-income school district where lunch period lengths varied from 20-30 minutes.
Main Outcome Measures
School food selection and consumption were collected using plate waste methodology.
Statistical Analyses Performed
Logistic regression and mixed-model ANOVA was used to examine food selection and consumption.
Results
Compared with meal component selection when students had at least 25 minutes to eat, students were significantly less likely to select a fruit (44% vs. 57%; p=0.0001) compared with when students had fewer than 20 minutes to eat. There were no significant differences in entrée, milk, or vegetable selection. Among those who selected a meal component, students with fewer than 20 minutes to eat consumed 13% less of their entrée (p<0.0001), 10% less of their milk (p<0.0001), and 12% less of their vegetable (p=0.0002) compared to when students had at least 25 minutes to eat.
Conclusions
Over the school year, a substantial number of students had insufficient time to eat, which was associated with significantly decreased entrée, milk, and vegetable consumption compared with students who had more time to eat. School policies that encourage lunches with at least 25 minutes of seated time may reduce food waste and improve dietary intake.