Table 3:

Mean maximum mouth opening across ethnic groups

Ethnic Group	Mean ± SD	Minimum	Maximum	p-value	t-test
Hausa	52.77 ± 8.06	34.00	77.00
Igbo	47.59 ± 8.61	21.60	72.00	<0.001	28.73
Yoruba	53.96 ± 6.27	33.40	71.00
All groups*	51.61 ± 8.14	21.60	77.00

^*The three major ethnic groups (Hausa, Igbo, Yoruba)