Bae Kyoung Ki, Kim Ho, Cho Sung Il
School of Public Health, Seoul National University, Seoul, Korea.
J Prev Med Public Health. 2011 Jul;44(4):167-75. doi: 10.3961/jpmph.2011.44.4.167.
This study was designed to describe the trends in body mass index (BMI) during 6 years (2002 - 2008) and to identify associations between these trends and the amount of physical activity of South Korean career soldiers.
This study targeted the 40 993 (38 857 men and 2136 women) of the 58 657 career soldiers who had undergone four (2002, 2004, 2006, and 2008) biennial medical examinations conducted by the National Health Insurance Corporation; 17 664 soldiers with missing data on height, weight, and physical activity were excluded. A linear mixed-regression model was used to categorize changes in BMI due to age versus those due to amount of physical activity.
Career soldiers experienced significant increases in BMI compared with baseline data gathered in 2002. The increases in each age group were as follows: men aged 20-29: 1.16, men aged 30-39: 0.61, men aged 40-49: 0.05, women aged 20-29: 0.35, women aged 30-39: 0.30, women aged 40-49: 0.26, and women aged 50-59: 0.21. However, men aged 50 or older showed significant decreases (as high as 0.5) in BMI compared with baseline data obtained in 2002. They also experienced significant decreases in BMI compared with those who reported no physical activity. The differences between baseline and final BMIs were: 0.02 for men exercising 1-2 times per week, -0.07 for men exercising 3-4 times per week, -0.19 for men exercising 5-6 times per week, -0.21 for men exercising seven times per week, -0.05 for women exercising 1-2 times per week, -0.19 for women exercising 3-4 times per week, -0.30 for women exercising 5-6 times per week, and -0.30 for women exercising seven times per week.
Obesity in South Korean career soldiers increased markedly between 2002 and 2008, and our data showed that the amount of physical activity was inversely related to increases in BMI. Policies to prevent obesity are needed to reduce this trend.
本研究旨在描述6年期间（2002 - 2008年）体重指数（BMI）的变化趋势，并确定这些趋势与韩国职业军人身体活动量之间的关联。
本研究以58657名职业军人中的40993名（38857名男性和2136名女性）为研究对象，这些军人接受了由国民健康保险公社进行的四次（2002年、2004年、2006年和2008年）两年一次的体检；排除了17664名身高、体重和身体活动数据缺失的军人。采用线性混合回归模型对因年龄导致的BMI变化和因身体活动量导致的BMI变化进行分类。
与2002年收集的基线数据相比，职业军人的BMI显著增加。各年龄组的增加情况如下：20 - 29岁男性为1.16，30 - 39岁男性为0.61，40 - 49岁男性为0.05，20 - 29岁女性为0.35，30 - 39岁女性为0.30，40 - 49岁女性为0.26，50 - 59岁女性为0.21。然而，50岁及以上男性的BMI与2002年获得的基线数据相比显著下降（高达0.5）。与报告无身体活动的人相比，他们的BMI也显著下降。基线BMI与最终BMI之间的差异为：每周锻炼1 - 2次的男性为0.02，每周锻炼3 - 4次的男性为 - 0.07，每周锻炼5 - 6次的男性为 - 0.19，每周锻炼7次的男性为 - 0.21，每周锻炼1 - 2次的女性为 - 0.05，每周锻炼3 - 4次的女性为 - 0.19，每周锻炼5 - 6次的女性为 - 0.30，每周锻炼7次的女性为 - 0.30。
2002年至2008年期间，韩国职业军人的肥胖率显著上升，我们的数据表明身体活动量与BMI的增加呈负相关。需要制定预防肥胖的政策来减少这种趋势。
