Table 2.

Assessment of tongue carcinoma in younger age group ≤40 years

Authors	Country	Total cases	Young cases, n (%)	Male/female	Tobacco/alcohol, n (%)
Jones et al.[14]	Canada	121	11 (9)	4/7	6/1 (55/9)
Sarkaria and Harari.[15]	USA	14	6 (43)	5/1	4/0 (67)
Atula et al.[16]	Finland	34	34 (100)	22/11	15/18 (44/53)
Friedlander et al.[17]	USA	72	36 (50)	20/16	15/22 (42/61)
Myers et al.[4]	USA	64	64 (100)	37/27	26/35 (41/55)
Vargas et al.[18]	USA	34	17 (50)	0/17	3/0 (18)
Hyam et al.[19]	Australia	129	15 (12)	9/6	8/6 (53/40)
Siriwardena.[6]	Srilanka	30	23 (77)	-	7/0 (30)
Liao et al.[20]	Taiwan	296	76 (26)	71/5	70/44 (92/58)
Harris et al.[21]	USA	25	25 (100)	10/15	12/0 (48)
Fang et al.[22]	China	176	15 (8)	6/9	5/2 (33/13)
Qahtani et al.[23]	KSA	61	8 (13)	6/2	1/3 (13/38)
Jeon et al.[3]	Korea	117	23 (20)	15/8	12/11 (52/48)