title: Anemia as a factor related to the progression of proliferative diabetic retinopathy after photocoagulation.
abstract: OBJECTIVE
  This study aimed to investigate factors that could be related to the progression of proliferative diabetic retinopathy in patients treated with photocoagulation.
  
  
  METHODS
  In this case-control study, a total of 106 patients with diabetic retinopathy participated who were treated with photocoagulation. We analyzed glycaemia, serum cholesterol, triglycerides, hemoglobin, platelet levels, blood pressure measurement, diabetes duration, diabetes and hypertension treatment, sex, and age. The statistical analysis was done with t test, χ² test, odds ratio (OR), and simple linear regression.
  
  
  RESULTS
  We found statistical significance in blood glucose level(P=.038), cholesterol level (P<.001), and hemoglobin level (P<.001). The simple linear regression was significant with blood glucose level (P<.05) and hemoglobin level (P=.001). Hemoglobin had a significant result: OR=2.432, 95% CI 1.902-3.115; Pearson χ²=16.812; P<.001.
  
  
  CONCLUSIONS
  Anemia is an important finding in diabetic patients. Anemia is a relevant factor related to the progression of proliferative diabetic retinopathy, which can be treated with photocoagulation.
authors.affiliation: Unidad Médica de Atención Ambulatoria #7, Instituto Mexicano del Seguro Social, San Pedro Garza García, Nuevo León, Mexico. fco_sepulveda67@hotmail.com
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Sepúlveda
authors.forename: Patricia
authors.initials: P
authors.lastname: Pérez
authors.forename: Martha G
authors.initials: MG
authors.lastname: Medinilla
authors.forename: Carmen A
authors.initials: CA
authors.lastname: Aboytes
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000740:Anemia / Q000150:complications*; D016022:Case-Control Studies; D003930:Diabetic Retinopathy / Q000097:blood / Q000150:complications / Q000503:physiopathology* / Q000601:surgery*; D018450:Disease Progression; D005260:Female; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D006937:Hypercholesterolemia / Q000150:complications; D006943:Hyperglycemia / Q000517:prevention & control; D017075:Laser Coagulation; D008297:Male; D008800:Mexico; D008875:Middle Aged; D012307:Risk Factors; D012720:Severity of Illness Index; D013223:Statistics as Topic; D018630:Vitreoretinopathy, Proliferative / Q000097:blood / Q000150:complications / Q000503:physiopathology* / Q000601:surgery*
chemical_list: D006454:Hemoglobins