文献中“Statistical analysis”中写到:Palmitoleate concentrations were evaluated in sex-specific quintiles as indicator variables andcontinuously per 1-SD difference.
上图注释部分写到Values are multivariable-adjusted linear regression coefficients for a 1-SD difference in palmitoleic acid concentrations as a percentage of fatty acids,
问题如下:
1. 文献里 1-SD difference是什么意思啊?
2.如何做呢?我看文献中用线性回归来做,脂肪酸的浓度是因变量,自变量是什么呢?比如Age,each 5 y这个变量,是不是把年龄按照(如35-40,40-45,45-50)这样的形式分成多组,作为自变量,然后线性回归分析?Age,each 5 y后面那个0.05(0.00,0.09)是什么呀?