PREVALENCE
In Type 1 diabetic patients, 13% have retinopathy at 5 years and 90% have retinopathy after 10-15 years. Twenty-five percent of Type 1 diabetics develop proliferative retinopathy after 15 years of diabetes.1 Type 2 diabetics taking insulin have a 40% prevalence of retinopathy at 5 years, while those on oral hypoglycemic agents have a 24% prevalence. By 15 -19 years of diabetes, the rates increase to 84% and 53% respectively. Proliferative retinopathy develops in 2% of Type 2 patients with <5 years of diabetes and 25% with 25 or more years of diabetes.2 The prevalence of nephropathy in diabetes has not been determined. Thirty percent with IDDM and 5-10% with NIDDM become uremic.3 The prevalence of neuropathy defined by loss of ankle jerk reflexes is 7% at 1 year increasing to 50% at 25 years4 for both type 1 and type 2 diabetes.
http://www.clevelandclinicmeded.com/diseasemanagement/endocrinology/microvascular/microvascular.htm
Does this link tells comparatively more complication ratio on use of insulin to oral diabetes medicines?
In conclusion, the tubules participate to the catabolism of insulin by two different mechanisms: (1) an uptake from the tubular fluid which can be inhibited by diuretics exerting their main action on the proximal tubules; (2) a direct catabolism from the interstitial fluid resulting from the large permeability of the peritubular capillaries to insulin.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1001004&dopt=Abstract
Does it indicate catabolism/renal loss of insulin, possible?
The walls of small blood vessels act as a microfilter, allowing the passage of water and solutes but blocking that of large molecules and cells . Oxygen, carbon dioxide and some nutrients transfer across the wall by diffusion, but the main transfer of fluid and solutes is by ultrafiltration,
http://medweb.bham.ac.uk/http/mod/3/1/a/permeability.html
Can you tell something about Vascular prermeability to insulin in kidneys & at other sites of body?
This link do indicate but not clear everything as accepted.
