Abstract
Cephalic index is an important parameter for classifying populations. In the present study, one thousand students with age ranging from 18 to 25 years of Urhobo and Itsekiri origin from rural and urban areas of Delta State of Nigeria were measured. The study was aimed at determining possible similarities and differences in the cephalic indices of the Urhobos and Itsekiris. The subjects were measured for head length and head breadth and cephalic index was worked out by dividing the head breadth by head length and multiplying by 100. Five hundred subjects comprising 250 males and 250 females for each tribe were measured. The cephalic indices for both groups were calculated and the result analyzed using z-test. On the average, the mean cephalic index in the two groups was >80 which puts them in the brachycephalic population. The z-test analysis indicated that there was significant difference between the Itsekiri males and Urhobo males and between the Itsekiri males and Urhobo females-However there was no significant difference between the two groups in general (P>0.05). The result of this study will be of importance in forensic medicine, anthropology and in genetics.
Highlights
Cephalic index is an important parameter for classifying populations
This study was aimed at documenting cephalic indices of these Nigerian ethnic groups which could be of importance in anthropological studies forensic medicine and clinical practice
The data was subjected to statistical analysis using a z-test
Summary
Cephalic index is an important parameter for classifying populations. It is very useful anthropologically to find out racial differences (Shah and Jadhav, 2004). It can be used to find out sexual differences (Williams et al 1995). Diagnostic comparison between patients and normal population has been made possible with the aid of standardized cephalometric records (Rabey, 1971). Stolovisky and Todd (1990) reported that dolicocephalic persons have otitis media less often than brachycephalic persons. Cohen and Kreiorg (1994) reported that individuals with Aperts syndrome are hyperbrachycephalic Stolovisky and Todd (1990) reported that dolicocephalic persons have otitis media less often than brachycephalic persons. Cohen and Kreiorg (1994) reported that individuals with Aperts syndrome are hyperbrachycephalic
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