A Follow-up Population Based Study of the Relationship Between Waist Circumference, Body-Mass Index and All-Cause Mortality in Kinmen, Taiwan

Introduction

Obesity is known to be associated with an increased risk of death. Body-mass index (BMI) is currently the most frequently used and widely accepted method to classify medical risk according to weight status. However, BMI is a poor indicator of body fat distribution. 

Materials and Methods

The data were collected from Kinmen, Taiwan from 1991 to 1993 then follow until 2007. A total sample of 12,107 adults aged 30 years old or above. Then, we excluded individuals who were missing information regarding height, weight, or circumference measurements (n =72). Remaining 12,035 adults (5,395 men and 6,640 women). Statistical analyses were conducted using SPSS 18.0. P-value <0.05 was considered to represent a statistically significant difference between two test populations.

Results

16 years survival rate : BMI＜18.00 is 79.60% , BMI 18.01~24.00 is 88.11% , BMI 24.01~27.00 is 86.69% and BMI＞27.01 is 80.50%. We can find out that people who as thin as lath or obesity have higher mortality. Male’s 16 years survival rate : WC＜80 is 84.89% , WC81~90 is 84.40% , WC 91~100 is 80.17% and WC＞101 is 68.93%. We can find out that people whose WC are bigger has higher mortality. Female’s 16 years survival rate : WC＜70 is 96.75% , WC71~80 is 94.32% , WC 81~90 is 87.84% and WC＞91 is 77.85%. We can find out that people whose WC are bigger has higher mortality.

Conclusion

Changes in BMI and WC were positively associated with mortality in both sexes. A higher BMI and WC in both sexes were associated with a higher risk of mortality.