Sex-specific height-correction of weight in a population with ethnic groups that differ in stature - the SAMINOR 1 Survey: a cross-sectional study
Background: Body mass index (BMI, weight/height2) is a common proxy for body fatness, but it is negatively correlated with height. In Norway, the ethnic Sami people have had higher BMI and lower height than their non-Sami peers. This article aimed to examine if previous findings of higher obesity me...
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2978994 2023-05-15T18:10:27+02:00 Sex-specific height-correction of weight in a population with ethnic groups that differ in stature - the SAMINOR 1 Survey: a cross-sectional study Michalsen, Vilde Lehne Coucheron, David Andre Kvaløy, Kirsti Melhus, Marita 2021 application/pdf https://hdl.handle.net/11250/2978994 eng eng Karolinska institutet Socialmedicinsk Tidskrift (SMT). 2021, 98 (5/6), 802-812. urn:issn:0037-833X https://hdl.handle.net/11250/2978994 cristin:1969830 Navngivelse-Ikkekommersiell 4.0 Internasjonal http://creativecommons.org/licenses/by-nc/4.0/deed.no CC-BY-NC 802-812 98 Socialmedicinsk Tidskrift (SMT) 5/6 Journal article Peer reviewed 2021 ftntnutrondheimi 2022-02-16T23:38:06Z Background: Body mass index (BMI, weight/height2) is a common proxy for body fatness, but it is negatively correlated with height. In Norway, the ethnic Sami people have had higher BMI and lower height than their non-Sami peers. This article aimed to examine if previous findings of higher obesity measures in Sami compared to non-Sami persist when applying an adequately height-corrected weight index. Methods: We estimated a sex-specific height-corrected weight index—the Benn index—that is, weight/heightp where p is estimated from log(weight)-log(height) regression. We used data on 15 717 men and women aged 30 and 36–79 years who participated in the SAMINOR 1 Survey (2003–2004). Correlations between height and weight and the indices BMI and Benn index were calculated using Pearson’s correlation coefficient. Results: BMI and height had a modest, negative correlation. Analyses were stratified by sex due to a statistically significant interaction (sex * log(height), p<0.001). There was no interaction with ethnicity (ethnicity * log(height), p=0.07 in women and p=0.24 in men). The p (95% confidence interval) in Benn index (weight/heightp) was estimated to 1.29 (1.21, 1.38) in women and 1.90 (1.83, 1.98) in men. Higher BMI in Sami compared to non-Sami was most evident in women, but Benn index did not differ by ethnicity in either sex. Conclusion: Previous findings of higher obesity measures in Sami than in non-Sami may be biased. Future studies should take into account the marked height differences between these groups when comparing obesity indices. publishedVersion Article in Journal/Newspaper sami NTNU Open Archive (Norwegian University of Science and Technology) Norway |
institution |
Open Polar |
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NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
Background: Body mass index (BMI, weight/height2) is a common proxy for body fatness, but it is negatively correlated with height. In Norway, the ethnic Sami people have had higher BMI and lower height than their non-Sami peers. This article aimed to examine if previous findings of higher obesity measures in Sami compared to non-Sami persist when applying an adequately height-corrected weight index. Methods: We estimated a sex-specific height-corrected weight index—the Benn index—that is, weight/heightp where p is estimated from log(weight)-log(height) regression. We used data on 15 717 men and women aged 30 and 36–79 years who participated in the SAMINOR 1 Survey (2003–2004). Correlations between height and weight and the indices BMI and Benn index were calculated using Pearson’s correlation coefficient. Results: BMI and height had a modest, negative correlation. Analyses were stratified by sex due to a statistically significant interaction (sex * log(height), p<0.001). There was no interaction with ethnicity (ethnicity * log(height), p=0.07 in women and p=0.24 in men). The p (95% confidence interval) in Benn index (weight/heightp) was estimated to 1.29 (1.21, 1.38) in women and 1.90 (1.83, 1.98) in men. Higher BMI in Sami compared to non-Sami was most evident in women, but Benn index did not differ by ethnicity in either sex. Conclusion: Previous findings of higher obesity measures in Sami than in non-Sami may be biased. Future studies should take into account the marked height differences between these groups when comparing obesity indices. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Michalsen, Vilde Lehne Coucheron, David Andre Kvaløy, Kirsti Melhus, Marita |
spellingShingle |
Michalsen, Vilde Lehne Coucheron, David Andre Kvaløy, Kirsti Melhus, Marita Sex-specific height-correction of weight in a population with ethnic groups that differ in stature - the SAMINOR 1 Survey: a cross-sectional study |
author_facet |
Michalsen, Vilde Lehne Coucheron, David Andre Kvaløy, Kirsti Melhus, Marita |
author_sort |
Michalsen, Vilde Lehne |
title |
Sex-specific height-correction of weight in a population with ethnic groups that differ in stature - the SAMINOR 1 Survey: a cross-sectional study |
title_short |
Sex-specific height-correction of weight in a population with ethnic groups that differ in stature - the SAMINOR 1 Survey: a cross-sectional study |
title_full |
Sex-specific height-correction of weight in a population with ethnic groups that differ in stature - the SAMINOR 1 Survey: a cross-sectional study |
title_fullStr |
Sex-specific height-correction of weight in a population with ethnic groups that differ in stature - the SAMINOR 1 Survey: a cross-sectional study |
title_full_unstemmed |
Sex-specific height-correction of weight in a population with ethnic groups that differ in stature - the SAMINOR 1 Survey: a cross-sectional study |
title_sort |
sex-specific height-correction of weight in a population with ethnic groups that differ in stature - the saminor 1 survey: a cross-sectional study |
publisher |
Karolinska institutet |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2978994 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
sami |
genre_facet |
sami |
op_source |
802-812 98 Socialmedicinsk Tidskrift (SMT) 5/6 |
op_relation |
Socialmedicinsk Tidskrift (SMT). 2021, 98 (5/6), 802-812. urn:issn:0037-833X https://hdl.handle.net/11250/2978994 cristin:1969830 |
op_rights |
Navngivelse-Ikkekommersiell 4.0 Internasjonal http://creativecommons.org/licenses/by-nc/4.0/deed.no |
op_rightsnorm |
CC-BY-NC |
_version_ |
1766183235509813248 |