marginally significantP=0.08
Consequently, among girls, the marginally significant difference in psychosomatic problems between 1988 and 1995 (b=0.078, P=0.08) and the significant difference between 1988 and 1998 (b=0.112, P<0.05) disappeared after accounting for the effects of worry (b=−0.030, n.s. and b=0.018, n.s., respectively).