For Physical-Social Functioning ( PSF ) , trajectory groups included Low Maintainer ( 8.3 % ) , Mid-Low Improver ( 10.4 % ) , Medium Decliner ( 10.7 % ) , Mid-High Maintainer ( 31.2 % ) , and High Maintainer ( 39.4 % ) ; for EF , trajectories included Low Maintainer ( 3 % ) , Mid-Low Improver ( 9 % ) , Medium Decliner ( 7.7 % ) , Mid-High Maintainer ( 22.8 % ) , and High Maintainer ( 57.5 % ) .