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Change in facial shape in two cohorts of Japanese adult female students twenty years apart.
Singapore Med J 2011; 52(11):818-23SM

Abstract

INTRODUCTION

Secular changes in the head and body dimensions of the Japanese population were recorded during the last century, but studies on Japanese adult facial shape were poorly documented. This study aimed to document the secular changes in facial shape and their association with craniofacial measures of Japanese adult female students.

METHODS

Data were collected from 1998-2001 and 1975-1979 from institutions in Tokyo and Kyoto. The prosopic index (PI) was derived from morphological facial height (n-gn) and bizygomatic breadth (zy-zy). Multiple regression analysis was used to determine the association between PI (facial form) and craniofacial measures.

RESULTS

Larger mean values for morphological facial height (n-gn) and for PI, but smaller values for bizygomatic breadth (zy-zy) and bigonial breadth (go-go) were observed in the current sample compared to their predecessors 21 years ago. The most prevalent facial shapes were mesoprosopic (30.53 percent) and euryprosopic (45.14 percent) for the current and previous series, respectively. There was a significant positive relationship between the PI and head length (g-op) (p less than 0.01), head breadth (eu-eu) (p less than 0.01) and head height (v-po) (p less than 0.05), and a negative relationship between the PI and head circumference (g-g) (p less than 0.01) and minimum frontal breadth (ft-ft) (p less than 0.01).

CONCLUSION

Our results suggest that a narrowing of facial shape has been occurring for approximately 21 years in adult Japanese females. The best predictor variables for PI were head length, head circumference, head breadth, minimum frontal breadth and head height.

Authors+Show Affiliations

Department of Orthopaedic Surgery, National Orthopaedic Centre of Excellence for Research and Learning, Faculty of Medicine, University of Malaya, Lembah Pantai, Kuala Lumpur 50603, Malaysia.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

22173252

Citation

Hossain, M G., et al. "Change in Facial Shape in Two Cohorts of Japanese Adult Female Students Twenty Years Apart." Singapore Medical Journal, vol. 52, no. 11, 2011, pp. 818-23.
Hossain MG, Saw A, Ohtsuki F, et al. Change in facial shape in two cohorts of Japanese adult female students twenty years apart. Singapore Med J. 2011;52(11):818-23.
Hossain, M. G., Saw, A., Ohtsuki, F., Lestrel, P. E., & Kamarul, T. (2011). Change in facial shape in two cohorts of Japanese adult female students twenty years apart. Singapore Medical Journal, 52(11), pp. 818-23.
Hossain MG, et al. Change in Facial Shape in Two Cohorts of Japanese Adult Female Students Twenty Years Apart. Singapore Med J. 2011;52(11):818-23. PubMed PMID: 22173252.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Change in facial shape in two cohorts of Japanese adult female students twenty years apart. AU - Hossain,M G, AU - Saw,A, AU - Ohtsuki,F, AU - Lestrel,P E, AU - Kamarul,T, PY - 2011/12/17/entrez PY - 2011/12/17/pubmed PY - 2012/4/18/medline SP - 818 EP - 23 JF - Singapore medical journal JO - Singapore Med J VL - 52 IS - 11 N2 - INTRODUCTION: Secular changes in the head and body dimensions of the Japanese population were recorded during the last century, but studies on Japanese adult facial shape were poorly documented. This study aimed to document the secular changes in facial shape and their association with craniofacial measures of Japanese adult female students. METHODS: Data were collected from 1998-2001 and 1975-1979 from institutions in Tokyo and Kyoto. The prosopic index (PI) was derived from morphological facial height (n-gn) and bizygomatic breadth (zy-zy). Multiple regression analysis was used to determine the association between PI (facial form) and craniofacial measures. RESULTS: Larger mean values for morphological facial height (n-gn) and for PI, but smaller values for bizygomatic breadth (zy-zy) and bigonial breadth (go-go) were observed in the current sample compared to their predecessors 21 years ago. The most prevalent facial shapes were mesoprosopic (30.53 percent) and euryprosopic (45.14 percent) for the current and previous series, respectively. There was a significant positive relationship between the PI and head length (g-op) (p less than 0.01), head breadth (eu-eu) (p less than 0.01) and head height (v-po) (p less than 0.05), and a negative relationship between the PI and head circumference (g-g) (p less than 0.01) and minimum frontal breadth (ft-ft) (p less than 0.01). CONCLUSION: Our results suggest that a narrowing of facial shape has been occurring for approximately 21 years in adult Japanese females. The best predictor variables for PI were head length, head circumference, head breadth, minimum frontal breadth and head height. SN - 0037-5675 UR - https://www.unboundmedicine.com/medline/citation/22173252/Change_in_facial_shape_in_two_cohorts_of_Japanese_adult_female_students_twenty_years_apart L2 - http://smj.sma.org.sg/5211/5211a6.pdf DB - PRIME DP - Unbound Medicine ER -