Limitations include the lack of a control group at the post-intervention follow - up and concerns about generalizability of the results, due to the largely white, middle - class, and educated sample. (cebc4cw.org)
Limitations include generalizability of the results due to not using a more culturally and socio - economically diverse population and reliability on self - reported measures. (cebc4cw.org)
The authors acknowledge a reduced generalizability of their results because procedures and risk factors change over time, which is a problem of all long - term follow - up studies. (sciencedaily.com)