topic How could I fit this model? in Statistical Procedures https://communities.sas.com/t5/Statistical-Procedures/How-could-I-fit-this-model/m-p/134745#M7028 <HTML><HEAD></HEAD><BODY><P>Consider</P><P>Hello , could someone help me with code to fit the model below:</P><P>Y_it denotes i measure at time t</P><P>Apha_i is intercept for subject i</P><P>X_i denote baseline age</P><P>O_i(t) denote positive indicator for subject “i” at time t</P><P>D_i(t) denote impairment state ie ‘0’ normal and ‘1’ impaired</P><P>Epsilon_it is error term for subject I at time t</P><P>DELTA_0 and DELTA_1 are time lags from positivity to influence on slope of cognitive process.</P><P>How do I fit this model:</P><P><STRONG><EM>Y_it= Apha_i +Beta_0&nbsp; *X_i + Beta_1&nbsp; *t + Beta_2&nbsp; * O_i*(t- DELTA_0)*t + Beta_3 * D_i *(t- DELTA_1)*t</EM></STRONG></P><P><STRONG><EM>+ Beta_4*O_i*(t- DELTA_0)* D_i *(t- DELTA_1)*t + Epsilon_it</EM></STRONG></P></BODY></HTML> Mon, 08 Sep 2014 15:01:05 GMT desireatem 2014-09-08T15:01:05Z How could I fit this model? https://communities.sas.com/t5/Statistical-Procedures/How-could-I-fit-this-model/m-p/134745#M7028 <HTML><HEAD></HEAD><BODY><P>Consider</P><P>Hello , could someone help me with code to fit the model below:</P><P>Y_it denotes i measure at time t</P><P>Apha_i is intercept for subject i</P><P>X_i denote baseline age</P><P>O_i(t) denote positive indicator for subject “i” at time t</P><P>D_i(t) denote impairment state ie ‘0’ normal and ‘1’ impaired</P><P>Epsilon_it is error term for subject I at time t</P><P>DELTA_0 and DELTA_1 are time lags from positivity to influence on slope of cognitive process.</P><P>How do I fit this model:</P><P><STRONG><EM>Y_it= Apha_i +Beta_0&nbsp; *X_i + Beta_1&nbsp; *t + Beta_2&nbsp; * O_i*(t- DELTA_0)*t + Beta_3 * D_i *(t- DELTA_1)*t</EM></STRONG></P><P><STRONG><EM>+ Beta_4*O_i*(t- DELTA_0)* D_i *(t- DELTA_1)*t + Epsilon_it</EM></STRONG></P></BODY></HTML> Mon, 08 Sep 2014 15:01:05 GMT https://communities.sas.com/t5/Statistical-Procedures/How-could-I-fit-this-model/m-p/134745#M7028 desireatem 2014-09-08T15:01:05Z