[A case-control study on risk factors of type 2 diabetes mellitus related chronic complications in Baoding city].

Objective: To recognize the main risk factors and to provide evidence for prevention and intervention of type 2 diabetes chronic complications.

Methods: A hospital-based frequency matched case-control study including 200 type 2 diabetes mellitus (T2DM) chronic complications cases and 200 controls without T2DM chronic complications was carried out in Baoding city. Relationships between factors and T2DM chronic complications were analyzed by non-conditional uni-variate and multivariate logistic regression methodologies.

Results: High C-reactive protein (CRP) (OR = 5.568), dyslipidemia (OR = 4.400), high blood urea nitrogen (BUN) (OR = 4.399), high low density lipoprotein-cholesterol (LDL-C) (OR = 3.594), time of hospitalization (OR = 2.612), grease food intake before developing DM (OR = 2.300), high HbA1c% (OR = 1.747), lack of exercise after the development of DM (OR = 1.672), duration of DM (OR = 1.509), mental stress (OR = 1.427), high-quality sleep (OR = 0.606), well control of blood glucose (OR = 0.517), well control of blood fat (OR = 0.299), insulin injections (OR = 0.155) etc. were all significantly associated with T2DM chronic complications.

Conclusion: The main risk factors of T2DM chronic complications seemed to be related to high CRP, dyslipidemia, high BUN and high LDL-C. The main protective factors were insulin injections, well control of blood fat and blood glucose, good-quality of sleep, while the unique risk factors of cardiovascular disease seemed to be high LDL-C and mental stress. The unique risk factors of neuropathy were lack of exercise after developing DM and the amount of sweet food intake. The duration of DM appeared to be the common risk factor and the common protective factor on those three complications was insulin injection.