Looking around on the internet you can also find valid analysis that refutes the China study and honestly MF, it sounds like you had some autoimmune issues with dairy.
You are absolutely correct Dan. In fact there is more data that refutes this study than supports it IMO.
The China Study was supposed to be a landmark EPIDEMIOLOGICAL collaborative investigation (between China, Cornell, Oxford universities) into the risks of saturated fat consumption.
The methodology used was a "longitudinal retrospective comparative analysis" of BLOOD TESTS PERFORMED on subjects within 1973-1975 and again some TEN years later between 1983-1985. The two data set were collated and contrasted to determine the "new incidence" of specific diseases such as: Breast, Colon and Prostate CA, Diabetes, ASCVD etc.
Importantly, it was
assumed any increased frequency of these diseases would be considered the result of China's dietary modifications, which was deemed vegetarian and healthful in the 1970's, to that of the Western diet, which was fat laden and leading to premature death in the 1980's.
However because the investigators failed to determine the dietary variance which was becoming more commonplace in many of China's provinces, they overlooked and did not realize the Western diet had already influenced China's saturated fat consumption as early as the 1960's.
This factor has become a major criticism of the study conclusions, since follow-up research has discovered a significant portion of the 1973-75 vegetarian cohort, ALSO consumed a considerable amount of animal fat, and for some it constituted more than 50% of their daily caloric needs!
Obviously this factor alone could limit the studies utility and reliability since relatively minor deviations in dietary animal fat consumption could (and did) significantly skew the data.
It also enables authors to "cherry pick" data for analysis, based on their own biases which Mr Campbell obviously did for his book "The China Study" published some 20 years later.
What's even more worrisome is the CAUSAL relationships often quoted from this EPIDEMIOLOGY study should not been made from the outset, since data from ANY EPIDEMIOLOGICAL investigation should be used to correlate, variable associations (such as animal fat consumption and heart disease) and NOT causation!
respects
jim