Case Age Gender Smoking Habit Alcohol Use Localization TNM Treatment Disease-free survival* 1 42 Male Yes Yes Tongue 310 Sur/Rad 6.18 2 51 Male Yes Yes Tongue 310 Sur/Rad 5.65 3 51 Male Yes No Retromolar 210 Surgery 1.93 4 73 Female Yes Yes Tongue 200 Surgery 5.71 5 72 Male No Yes Tongue 200 Surgery 5.98 6 49 Male Yes Yes Tongue 310 Surgery 5.75 7 57 Male Yes Yes Tongue 400 Surgery 3.64 8 69 Male Yes No Tongue 100 Surgery 4.24 9 58 Male Yes Yes Tongue 310 Sur/Rad 6.90 10 49 Male Yes Yes Tongue 100 Surgery 1.70 11 65 Male Yes Yes Tongue 100 Surgery 5.95 12 70 Male Yes Yes Tongue 300 Surgery 3.78 13 60 Male Yes Yes Retromolar 400 Surgery 4.79 14 40 Male Yes Yes Retromolar 42a0 Sur/Rad 3.64 15 45 Male Yes Yes Tongue 210 Surgery 4.86 16 53 Male Yes Yes Tongue 300 Sur/Rad 7.33 17 56 Male Yes Yes Tongue 400 Sur/Rad 6.70 *Time in Months

Table 1: Distribution of 17 cases of early recurrence of oral squamous cell carcinomas according to demographic, lifestyle and clinical variables.