title: Physical activity, family history of diabetes and risk of developing hyperglycaemia and diabetes among adults in Mainland China.
abstract: OBJECTIVE
  To investigate the joint influence of physical activity and family history of diabetes on the subsequent risk of developing hyperglycaemia and Type 2 diabetes among Chinese adults.
  
  
  METHODS
  A prospective community-based cohort study was conducted among adults aged 35 years and older during 2004-2007 in Nanjing, China. Four communities (three urban and one rural) were randomly selected from 11 urban districts and two rural counties. Hyperglycaemia and Type 2 diabetes were defined using World Health Organization criteria based on fasting blood glucose concentration and physicians' diagnosis, respectively. Physical activity, parental diabetes history, and other important covariates were assessed at baseline and in the third-year follow-up survey.
  
  
  RESULTS
  At study conclusion data were collected from 3031 participants (follow-up rate 81.3%). The 3-year cumulative incidence of hyperglycaemia and Type 2 diabetes was 6.2% and 2.4%, respectively. After adjustment for potential confounding variables, compared with those with positive family history and insufficient physical activity, the adjusted relative risk ratio (95% CI) of developing hyperglycaemia was 0.19 (0.02, 1.51) for participants with sufficient physical activity and a positive family history; 0.55 (0.31, 0.97) for participants with insufficient physical activity and a negative family history; and 0.36 (0.19, 0.70) for participants with sufficient physical activity but a negative family history. Participants who had a negative family history and insufficient physical activity were also less likely to develop Type 2 diabetes (RRR = 0.28; 0.14, 0.54), and participants with a negative family history and sufficient physical activity were the least likely to develop Type 2 diabetes (0.23; 0.10, 0.56).
  
  
  CONCLUSIONS
  Sufficient physical activity and negative family history of diabetes may jointly reduce the risk of developing hyperglycaemia and Type 2 diabetes in Chinese adults.
authors: Department of Non-communicable Disease Prevention, Nanjing Municipal Center for Disease Control and Prevention, Nanjing, China. f.xufei@gmail.com
authors: F
authors: F
authors: Xu
authors: Y
authors: Y
authors: Wang
authors: R S
authors: RS
authors: Ware
authors: L Ah
authors: LA
authors: Tse
authors: D W
authors: DW
authors: Dunstan
authors: Y
authors: Y
authors: Liang
authors: Z
authors: Z
authors: Wang
authors: X
authors: X
authors: Hong
authors: N
authors: N
authors: Owen
mesh_terms: D000328:Adult; D000368:Aged; D044466:Asian People / Q000706:statistics & numerical data*; D002681:China / Q000453:epidemiology; D015331:Cohort Studies; D003924:Diabetes Mellitus, Type 2 / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D005192:Family Health; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006943:Hyperglycemia / Q000150:complications / Q000453:epidemiology* / Q000517:prevention & control; D015994:Incidence; D008297:Male; D008875:Middle Aged; D009043:Motor Activity; D009765:Obesity / Q000150:complications / Q000453:epidemiology* / Q000517:prevention & control; D010375:Pedigree; D011446:Prospective Studies; D012307:Risk Factors; D011795:Surveys and Questionnaires