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Table 6 Comparison of characteristics of patients enrolled and those lost to follow-up

From: Survival and associated factors among patients with oral squamous cell carcinoma (OSCC) in Mulago hospital, Kampala, Uganda

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