Human patients with impaired glucose tolerance progress to type 2 diabetes at a rate of up to 6 % per year (28). (academic.oup.com)
Interestingly, lean cats that developed impaired glucose tolerance with weight gain already had on average 35 % lower insulin sensitivity than cats that maintained normal glucose tolerance after gaining weight. (academic.oup.com)
Despite the evidence that obesity causes impaired glucose tolerance, it appears that very few dogs develop overt diabetes as a consequence of obesity - induced insulin resistance. (academic.oup.com)