Objective To investigate the prevalence of impaired glucose regulation （IGR） in the population of Tianjin. Methods A cross-sectional study was conducted in Tianjin from June to September in 2005. The multi-phasic stratified cluster sampling method was adopted. Totally

21 454 people were selected as survey sample. Information on risk factors was collected through face-to-face questionnaire interview. Fasting capillary whole blood glucose level and other clinical indexes were tested. Results The prevalence of impaired fasting glucose （IFG） in the population was 5.61% （5.32% in male

5.89% in female）. The prevalence of impaired glucose tolerance （IGT） was 2.91% （2.59% in male

3.20% in female） in whole population

and the prevalence of female was significantly higher than that of male （P = 0.04）. The prevalences of IFG and IGT increased with the increasing of age. And the prevalences were also influenced by the profession

educational level

and income level. Conclusion The prevalences of IGT and IFG in Tianjin are similar to those in the other big cities of China.