Caspian Journal of Internal Medicine
1
Caspian J Intern Med
Medical Sciences
http://caspjim.com
1
admin
2008-6164
2008-6172
8
10.22088/cjim
14
8888
13
en
jalali
1394
4
1
gregorian
2015
7
1
6
3
online
1
fulltext
en
Sex difference of biological variation of BMI and waist circumference with age in Iranian adults: A predictive regression model
Health
Health
Original Article
Original Article
<p align="left"><font face="Times New Roman" size="3"> </font><font face="Times New Roman"><b><i><span style="color: blue font-size: 10pt">Background: </span></i></b><span style="font-size: 10pt mso-bidi-language: FA">Background and Objectives: The
biological variation of body mass index (BMI) and waist circumference (WC</span><span style="font-size: 9pt mso-bidi-language: FA">) with age may vary by gender. The
objective </span><span style="font-size: 10pt mso-bidi-language: FA">of this
study was to investigate the functional relationship of anthropometric measures
with age and sex.</span></font></p><p align="left"><font face="Times New Roman"><span style="font-size: 10pt mso-bidi-language: FA"></span></font><font face="Times New Roman"><b><i><span style="color: blue font-size: 10pt">Methods:</span></i></b><span style="font-size: 10pt"> </span><span style="font-size: 10pt mso-bidi-language: FA">The data were collected from a population-based cross-sectional study of
1800 men and 1800 women aged 20-70 years in northern Iran.</span><span style="font-size: 10pt"> The linear and quadratic pattern of age on weight,
height, BMI and WC and WHR were tested statistically and the interaction effect
of age and gender was also formally tested.</span></font></p><p align="left"><font face="Times New Roman" size="3"> </font><font face="Times New Roman"><b><i><span style="color: blue font-size: 10pt">Results:</span></i></b><span style="font-size: 10pt"> </span><span style="font-size: 10pt mso-bidi-language: FA">The quadratic model (age<sup>2</sup>) provided a significantly better fit
than simple linear model for weight, BMI and WC. BMI, WC and weight explained a
greater variance using quadratic form for women compared with men (for BMI, R<sup>2</sup>=0.18,
p<0.001 vs R<sup>2</sup>=0.059, p<0.001 and for WC, R<sup>2</sup>=0.17,
p<0.001 vs R<sup>2</sup>=0.047, p<0.001). For height, there is an inverse
linear relationship while for WHR, a positive linear association was apparent
by aging, the quadratic form did not add to better fit.</span></font></p><p align="left"><font face="Times New Roman" size="3"> </font><font face="Times New Roman"><b><i><span style="color: blue font-size: 10pt">Conclusion: </span></i></b><span style="font-size: 10pt mso-bidi-language: FA">These findings indicate the
different patterns of weight gain, fat accumulation for visceral adiposity and
loss of muscle mass between men and women in the early and middle adulthood.</span></font></p><p align="left"><font face="Times New Roman" size="3"> </font></p>
Body mass index, Waist circumference, Waist to hip ratio, Quadratic form, Adults
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133
http://caspjim.com/browse.php?a_code=A-10-133-1&slc_lang=en&sid=1
Karimollah
Hajian-Tilaki
drhajian@yahoo.com
10031947532846003532
10031947532846003532
No
Babol University of Medical Sciences
Behzad
Heidari
bheidari6@gmail.com
10031947532846003533
10031947532846003533
Yes
Babol university of Medical Sciences