Soft-drink science

The JAMA site seems to be down, so I can't go read the much-ballyhooed (and disagreed-with) article about the influence of soda on type 2 diabetes. (Not that I particularly want to go read it; how many Nurses Health Study articles can one go through in a lifetime? Plus the hypothesis seems boring.)

Different claims about this research have been made by quarreling bloggers and media types. Without scrolling down to the bottom of this post, can you guess which of these claims are contradictory?

1. Soda is associated with an increased rate of type 2 diabetes.

2. Not all relevant confounders were controlled for in the study in question.

3. The current study contradicts a previous study.

4. The current study was properly conducted according to current standards of epidemiologic practice.

5. Soda should be avoided by those with other risk factors for diabetes.

6. Any number of other unhealthful foods would yield the same risk increase for type 2 diabetes.
7. The risk increase is small.

8. The risk increase is statistically significant.

9. The risk increase does not seem to warrant a broad-based campaign to stop soda drinking.

Do you want to know the answer to the trick question? It's not a surprise: none of these statements are mutually exclusive! In fact, I think all of them are true.