Phytochemical index scoreThe current study also determined the average PI meal score for the Kentucky Bluegrass AAA congregate meal 2014–2015 lunch menus. The average PI meal score was derived using nutrient information from all meals served over a 1-year period. Then, the average PI meal score based on actual food intake was calculated by averaging the intake of the meal components as determined by the eight plate-waste measurements. To obtain the PI score, the McCarty equation was used (McCarty, 2004).