TY - JOUR
T1 - Development, validation, and use of a semi-quantitative food frequency questionnaire for assessing protein intake in Papua New Guinean Highlanders
AU - Morita, Ayako
AU - Natsuhara, Kazumi
AU - Tomitsuka, Eriko
AU - Odani, Shingo
AU - Baba, Jun
AU - Tadokoro, Kiyoshi
AU - Igai, Katsura
AU - Greenhill, Andrew R.
AU - Horwood, Paul F
AU - Soli, Kevin W.
AU - Phuanukoonnon, Suparat
AU - Siba, Peter M.
AU - Umezaki, Masahiro
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Objectives: The aim of this article was to develop a semi-quantitative food frequency questionnaire (FFQ) and evaluate its validity to estimate habitual protein intake, and investigate current dietary protein intakes of Papua New Guinea (PNG) Highlanders. Methods: A 32-item FFQ was developed and tested among 135 healthy male and female volunteers. The FFQ-estimated daily total and animal protein intakes were compared with biomarkers and 3-day Weighed Food Records (WFR) by correlation analyses, Bland-Altman plot analyses and joint classification analyses. Results: The FFQ-estimated total protein intake significantly correlated with urinary nitrogen in the first morning void after adjusting urinary creatinine concentration (r=0.28, P<0.01) and the FFQ-estimated animal protein intake significantly correlated with the hair δ15N (Spearman's r=0.34, P<0.001). The limits of agreement were ±2.39 Z-score residuals for total protein intake and ±2.19 Z-score for animal protein intake, and intra-individual differences increased as protein intake increased. The classification into the same and adjacent quartiles was 66.0% for total protein intake and 73.6% for animal protein intake. Median daily total and animal protein intake estimates from the FFQ and the 3-day WFR showed a good agreement with differences of 0.2 and 4.9 g, respectively. None of the studied communities in the PNG Highlands met the biologically required protein intake; although the community closer to an urban center showed higher protein intake than the more remote communities. Conclusions: The newly developed 32-item FFQ for PNG Highlanders is applicable for evaluation of protein intake at the individual level. Am. J. Hum. Biol. 27:349-357, 2015.
AB - Objectives: The aim of this article was to develop a semi-quantitative food frequency questionnaire (FFQ) and evaluate its validity to estimate habitual protein intake, and investigate current dietary protein intakes of Papua New Guinea (PNG) Highlanders. Methods: A 32-item FFQ was developed and tested among 135 healthy male and female volunteers. The FFQ-estimated daily total and animal protein intakes were compared with biomarkers and 3-day Weighed Food Records (WFR) by correlation analyses, Bland-Altman plot analyses and joint classification analyses. Results: The FFQ-estimated total protein intake significantly correlated with urinary nitrogen in the first morning void after adjusting urinary creatinine concentration (r=0.28, P<0.01) and the FFQ-estimated animal protein intake significantly correlated with the hair δ15N (Spearman's r=0.34, P<0.001). The limits of agreement were ±2.39 Z-score residuals for total protein intake and ±2.19 Z-score for animal protein intake, and intra-individual differences increased as protein intake increased. The classification into the same and adjacent quartiles was 66.0% for total protein intake and 73.6% for animal protein intake. Median daily total and animal protein intake estimates from the FFQ and the 3-day WFR showed a good agreement with differences of 0.2 and 4.9 g, respectively. None of the studied communities in the PNG Highlands met the biologically required protein intake; although the community closer to an urban center showed higher protein intake than the more remote communities. Conclusions: The newly developed 32-item FFQ for PNG Highlanders is applicable for evaluation of protein intake at the individual level. Am. J. Hum. Biol. 27:349-357, 2015.
UR - http://www.scopus.com/inward/record.url?scp=84927734906&partnerID=8YFLogxK
U2 - 10.1002/ajhb.22647
DO - 10.1002/ajhb.22647
M3 - Article
C2 - 25367668
AN - SCOPUS:84927734906
SN - 1042-0533
VL - 27
SP - 349
EP - 357
JO - American Journal of Human Biology
JF - American Journal of Human Biology
IS - 3
ER -