There was no clear effect of any dietary fat intervention compared to usual or control diet on mortalityThere was no clear effect of any dietary fat intervention compared to usual diet on cardiovascular mortalityI could quote more, but from the author directly:There was a reduction in cardiovascular events for any dietary fat intervention compared with usual diet
but it is likely that a few small studies with more cardiovascular events in the intervention groups may be missing from the review
-No stastistically significant change in heart attack/stroke/cancer/diabetes.
-Claimed reductions in LDL(we know the limitations there)
-the "modified fat"(more mono/polyunsaturated) had lower triglycerides. Again, we know lower-carb/animal-heavy diets can do as well or better here.
-generally doesn't effect blood pressure
Basically, there's a correlated reduction in "cardiovascular events", and that's about it - overall mortality is unchanged, and for everything else the confidence intervals include the 0/1.0 point, meaning that there's a significant chance there was no meaningful(or the opposite) effect.
And the bottom line is that the study ONLY looks at two things: relative fraction of calories from fat, and (loosely) fat breakdown - emphasis on unsaturated fats. The problems with this:
-Doesn't separate monounsaturated from polyunsaturated, and certainly ignores n-3 to n-6 ratios (confounding factors)
-While it ostensibly looks at fat calories versus carbohydrate calories, carbohydrate quality is not discussed
Basically it shows that there may be some slight, situational risk reduction as a result of reducing fat intake, but it does nothing to establish any greater level of detail - was it really saturated fats? How did total PUFA's change? What kind of carbohydrates was the population consuming? It certainly didn't show a mammoth, colossal shift in health/mortality outcomes.