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Esophageal Squamous Cell Carcinoma Risk Factors in a Kenyan Population: A Case Control Study

Thesis Info

Author

Machoki, Stanley M.

Department

General Surgery (East Africa)

Program

MMed

Institute

Aga Khan University

Institute Type

Private

City

Karachi

Province

Sindh

Country

Pakistan

Thesis Completing Year

2009

Thesis Completion Status

Completed

Subject

Medicine

Language

English

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676728049201

Similar


Background: Esophageal squamous cell carcinoma (ESCC) is a common malignancy inKenya with a dismal outcome with a majority of patients presenting late. The factors that are operative in the etiology of this disease and its geographic distribution withinKenya have not been characterized thus far. Objectives: The objective of this study was to determine the association of ESCC with Khat chewing, which is prevalent in parts ofKenya, and other commonly implicated risk factors (i.e. smoking, alcohol, diet, socioeconomic status, caustic ingestion and first degree family history of ESCC). We also determined the geographic (provincial) origin, age/sex and ethnicity of cases visiting the participating centers. Methodology: A multi-center based matched case-control study was carried by means of a questionnaire and a food frequency table to collect data on proposed risk factors, demographics and dietary habits among cases of histology confirmed ESCC and controls within the same center. Setting: The study was conducted between August 2008 and April 2009 at St. Mary’sMissionHospital (Nairobi),KenyattaNationalHospital (Nairobi),ChogoriaMissionHospital (Eastern province) andAga KhanUniversityHospital (Nairobi). Subjects: We had 83 cases and 166 controls matched for age (±5 years) and sex. Analysis: The degree of association between development of ESCC and proposed risk factors was calculated through logistic regression. Results: The male:female ratio of cases was 2.1:1, the majority of cases were from Central and Eastern province and mostly of Kikuyu ethnic origin and 42% were below 55 years with 19% below 45 years of age. The cases were of a lower socio-economic status based on the type of housing, education and type of cooking fuel used. Univariate analysis show that caustic ingestion (OR 9.292 CI 2.541 – 33.981), poor housing (OR 1.710 CI 1.002 – 2.919), family history of ESCC (OR 2.670 CI 1.012 – 7.046), a low education level (OR 1.7515 CI 1.001 – 2.936), and cigarette smoking (OR 1.059 CI 1.026 – 1.093) were each associated with a higher adjusted odds ratio for development of ESCC. Chewing of khat (OR 1.002 CI 0.987 – 1.018), alcohol (OR 1.00 CI 1.00 – 1.00), tea (OR 1.001 CI 1.00 – 1.002) and a staple diet consisting of starch (OR 1.00 CI 0.99 – 1.00) were not associated with development of ESCC. On multivariate analysis the most significant factors were caustic ingestion (OR 11.354 CI 3.036 – 42.461), first degree family history of ESCC (OR 3.505 CI 1.294 – 9.490) and poor housing (OR 1.978 CI 1.109 – 3.527). Conclusions:
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