Table 6 Comparison of characteristics of patients enrolled and those lost to follow-up
Variable | Alive/Dead | Lost to follow-up | P value | ||
|---|---|---|---|---|---|
Total (n = 173) | % | Total (n = 141) | % | ||
Gender | |||||
Male | 105 | 60.7 | 81 | 57.4 | 0.560 |
Female | 68 | 39.3 | 60 | 42.6 | |
Age (years) | |||||
Median (IQR) | 56 | (44.5–66) | 60 | (47.5–66) | 0.284 |
Tobacco use | |||||
User | 79 | 51.6 | 68 | 58.6 | 0.254 |
Non-user | 74 | 48.4 | 48 | 41.4 | |
Alcohol use | |||||
User | 85 | 55.9 | 55 | 48.2 | 0.215 |
Non-user | 67 | 44.1 | 59 | 51.8 | |
Tumour location | |||||
Alveolus | 6 | 3.6 | 10 | 7.1 | 0.764 |
Buccal mucosa | 17 | 9.8 | 18 | 12.8 | |
Floor of mouth | 22 | 12.7 | 13 | 9.2 | |
Gingiva | 23 | 13.3 | 15 | 10.6 | |
Lip | 7 | 4.0 | 9 | 6.4 | |
Palate | 24 | 13.9 | 21 | 14.9 | |
Tongue | 62 | 35.8 | 47 | 33.3 | |
Other | 12 | 6.9 | 8 | 5.7 | |
Clinical stage | |||||
I | 16 | 9.2 | 7 | 5.0 | 0.410 |
II | 31 | 17.9 | 26 | 18.4 | |
III | 79 | 45.7 | 69 | 48.9 | |
IV | 47 | 27.2 | 39 | 27.7 | |
Histo-pathological grade | |||||
Well differentiated | 80 | 45.8 | 89 | 63.1 | 9.351 |
Moderately differentiated | 46 | 26.8 | 32 | 22.7 | |
Poorly differentiated | 47 | 27.4 | 20 | 14.2 | |
Treatment group | |||||
Surgery | 18 | 11.8 | 17 | 15.0 | 0.057 |
Radiotherapy | 110 | 71.9 | 72 | 63.7 | |
Chemotherapy | 2 | 1.3 | 1 | 0.9 | |
At least 2 | 23 | 15 | 23 | 20.4 | |