Table 2.

Variation in mouth opening with age

Age group	Sex	n	Mean ± SD (mm)
21–30	Male	102	56.7 ± 7.2
	Female	99	51.7 ± 4.5
31–40	Male	98	57.1 ± 6.5
	Female	96	50.7 ± 2.5
41–50	Male	99	52.5 ± 8.8
	Female	86	47.7 ± 3.9
51–60	Male	87	48.3 ± 6.2
	Female	79	42.0 ± 4.6
61–70	Male	77	45.8 ± 5.2
	Female	71	40.2 ± 6.6