Risk Factors of Esophageal Squamous Cell Cancer in Southwestern Uganda: A Case-Control Study
*Samson Okello Department Of Internal Medicine, Mbarara University Of Science & Technology, Mbarara, Uganda
*Corresponding Author: Samson Okello
Department Of Internal Medicine, Mbarara University Of Science & Technology, Mbarara, Uganda Email:firstname.lastname@example.org
Published on: 2016-03-06
Background: Despite the high rates and regional variations of squamous cell cancer of the esophagus (ESCC) in East Africa, little is known about the region specific risk factors. We aim to determine factors associated with ESCC in southwestern Uganda.
Methods: We conducted a case-control study of patients presenting for upper endoscopic examination from 2003 to 2014 at Mbarara Regional Referral Hospital, southwestern Uganda. Demographic and social data were collected prior to endoscopy including: age, gender, smoking status and alcohol use. Cases were those with a histological diagnosis of ESCC. Controls were participants with normal endoscopies or only gastritis. Patients with gastric cancer or peptic ulcer disease by histopathological examination or missing results were excluded. We used logistic regression to assess for association between age, sex, alcohol intake, and smoking with ESCC.
Results: Sixty-seven cases and 142 controls were included with a median age of 51 years (IQR 40 - 64); and male predominance (59.43%). Dysphagia and/or odynophagia were more frequent endoscopic indications in cases compared to controls (72.29% vs 5.56%, p<0.0001). Male gender (AOR 16.46, 95% CI 3.21 - 84.48, p=0.001), age group 41 to 50 years (AOR 13.32, 95%CI 1.16 - 15.3, p=0.038), and history of both alcohol and smoking (AOR 4.10, 95%CI 1.14 - 14.78, p=0.031) were associated with ESCC.
Conclusion: Our results emphasize the role of younger age, male gender, alcohol intake and smoking as risk factors for ESCC in this population. Expediency and priority should be taken in early evaluation for esophageal cancer in southwestern Uganda in symptomatic patients with these risk factors.
Esophageal squamous cell carcinoma; Substance use
Despite a well described increase in adenocarcinoma, esophageal squamous cell carcinoma (ESCC) remains the predominant type of esophageal cancer worldwide. In sub-Saharan Africa, incidence of esophageal cancer has regional variation with southern and eastern regions reporting significantly higher incidence rates. Even within regions, there are within country variations. These variations may be due to differences in risk factor profiles. In East African men, esophageal cancer is the second most commonly diagnosed cancer and the second highest cause of cancer deaths.