“…Benward & Densen-Gerber, 1975;Brown & Anderson, 1991;Cavaiola & Schiff, 1989;Dembo et al, 1988;Downs et al, 1991;Gomes-Schwartz et al, 1985;Harrison et al, 1989;Hatzichristou & Papadatos, 1993;Hussey & Singer, 1993;Ladwig & Anderson, 1989;Lindberg & Distad, 1985;McGaha, 1993;Rohsenow et al, 1988;Runtz & Briere, 1986;Sansonnet-Hayden et al, 1987;Singer et al;Walker et al, 1989Walker et al, , 1992Wallen & Berman, 1992). Unfortunately, with few exceptions, these studies are cross-sectional in design.…”