SAS帮助“the mixed procedure:repeated measure”里面那个fixed effect为gender/age/age*gender的例子里的截距有差异，gender无差异，这种现象怎么解释？截距的差异不就是gender差异的表现吗？求指导，谢谢！
Output 56.2.8 Repeated Measures Analysis (continued) :
Solution for Fixed Effects
EffectGenderEstimateStandard ErrorDFt ValuePr > |t|
Intercept 15.84230.93562516.93<.0001
GenderF1.58311.4658251.080.2904
GenderM0....
Age 0.82680.079112510.45<.0001
Age*GenderF-0.35040.123925-2.830.0091
Age*GenderM0....