Assessment of the environmental risk factors for a gastric ulcer in northern Ghana

Assessment of the environmental risk factors for a gastric ulcer in northern Ghana

Stephen Tabiri^1,&, Prosper Akanbong², Braimah Abubakari²

 

¹University for Development Studies, School of Medicine and Health Sciences, Department of Surgery, Tamale Teaching Hospital, Tamale, Ghana, ²University for Development Studies, School of Medicine and Health Sciences, Department of Internal Medicine, Tamale Teaching Hospital, Tamale, Ghana

 

 

^&Corresponding author
Stephen Tabiri, University for Development Studies, School of Medicine and Health Sciences, Department of Surgery, Tamale Teaching Hospital, Tamale, Ghana

 

 

 

 

Dyspepsia is a nonspecific term that denotes upper abdominal discomfort that is thought to arise from the upper gastrointestinal (GI) tract. A gastric ulcer is a common cause of dyspepsia that encompasses a variety of more specific symptoms including epigastric discomfort or pain, bloating, anorexia, early satiety, belching or regurgitation, nausea, and heartburn. The gastric ulcer has been found in 4.3% of patients with dyspeptic symptoms in the central part of Ghana [1]. Numerous risk factors have been implicated in the development of a gastric ulcer. Common environmental risk factors attributed to the development of gastric ulcer include Helicobacter pylori infection, chronic non-steroidal anti-inflammatory (NSAID) intake, and alcohol consumption. Environmental factors play a vital role in the development of a gastric ulcer. The aim of this study was to identify environmental risk factors responsible for the development of a gastric ulcer in patients in northern Ghana undergoing endoscopic diagnosis.

 

 

The data for this retrospective study were obtained from patient records from the Minimal Access Therapy and Operative Endoscopy unit of the Tamale Teaching Hospital in Tamale, Ghana from 2010 to 2014. All of the patients who received an endoscopic diagnosis at the unit were included in the study. Patients were either referred to the hospital from other facilities or reported directly to the hospital. Those patients who underwent colonoscopy were excluded. The objectives of the study were explained to the patients on the appointed day, and a written consent form was obtained from each patient. The study was approved by the chief executive officer of the Tamale Teaching Hospital. Before patients underwent endoscopy, a questionnaire (Figure 1) on smoking history, NSAID intake, and alcohol consumption was administered to patients by an endoscopy nurse. Information on the socio-demographic status, GI symptoms and clinical diagnosis were obtained from patients' folders. Gastric biopsies for rapid urease test were performed during endoscopy for detection of H. pylori. The endoscopic findings and the results of the rapid urease test were recorded. Data collected from patients' records included socio-demographic status, symptoms presented, and the results of clinical and endoscopy diagnoses. A separate questionnaire (Figure 1) was administered to patients by an endoscopy nurse following endoscopy to assess risk factors for a gastric ulcer. Statistical Package for Social Sciences (SPSS) version 20.0 was used to analyse the data. Univariate and bivariate analyses were performed to ascertain environmental risk factors for gastric ulcer. The Chi-square values of the bivariate analysis were considered statistically significant when P < 0.05.

 

 

Table 1: a total of 2035 patients were included in the study. Some patients had more than one endoscopy finding; therefore, the total number of endoscopy findings was 3176. The age range was 2-89 years, and a mean age was 40.2 ± 16.7 years (mean ± SD). A total of 1037 men (51.0%) and 998 women (49.0%) were included in the study. The largest number of patients was in the age group 31-40 years (680/2035, 34.4%. The least number of patients was in the age group 2-15 years (35/2035, 1.7%. The epigastric pain was the most frequent major symptom (1551/2035, 76.2%) followed by abdominal pain (1002/2035, 49.2%). Other significant symptoms such as heartburn, effortless vomiting, hematemesis, and dysphagia, were present in 13.4% (273/2035), 10.6% (215/2035), 7.5% (153/2035), and 6.5% (132/2035) patients, respectively. The peptic ulcer disease (PUD) clinical diagnosis was most common (1451/2035, 71.3%), followed by gastro-reflux disease (GORD) (184/2035, 9.0%), upper GI bleeding (144/2035, 7.1%), gastric cancer (136/2035, 6.7%), and oesophageal cancer (61/2035, 3.0%). A total of 1259/2053 (61.9%) patients tested positive for H. pylori infection.

 

Of 2035 patients, 1344 (66.0%) marked NSAID on the questionnaire; 1812 (89.0%) patients admitted alcohol intake greater than 5 units/day. Herbal usage for medicinal purposes (traditional concoction) was used by 822 (40.4%) patients. Cigarettes and cannabis were used by 183 (8.9%) patients. Fasting or irregular eating was present in 1126 (55.3%) cases.

 

Table 2: bivariate analysis revealed a strong association between gastric ulcer and the following risk factors: smoking of cigarette including weeds (P = 0.001, χ² = 27.3), fasting (P = 0.001, χ² = 42.6), H. pylori infection (P = 0.01, χ² = 19.9), and alcohol consumption (P = 0.001, χ² = 30.6). There was no association between herbal usage and gastric ulcer (P = 0.251, χ² = 1.8).

 

 

Dyspepsia is a common affliction with an estimated prevalence of up to 40% in the general population worldwide [2]. It accounts for 25-47% of patients refer for upper GI endoscopy in East Africa [3-5]. The patients included in the study were between 2 and 89 years old; the majority were 31-45 years old. These findings differ from Veldhuyzen et al. [6] who found dyspeptic symptoms predominantly in people <20 years. In our study, the dyspeptic symptoms were predominantly found in older patients. This could be attributed to lifestyle choices such as irregular eating habits, cigarette smoking, and chronic NSAID intake prevailing in the older group in Ghana. Ohene-Yeboah et al [7] found that NSAID, herbal medicines or concoctions are commonly abused by patients with gastric perforation [6,7]. In the current study, the incidence of epigastric pain was 41.6% which is consistent with the previous report [8]. Clinical diagnosis of PUD was 71.9% in our series, similar to earlier findings [9].

 

Common causes of dyspepsia symptoms include gastric ulcer, GORD, functional disorders (non-ulcer dyspepsia), malignancy, and age <45 years [10-14]. According to Numans et al. [15], H. pylori infection plays a crucial role in the pathogenesis of gastric ulcer. In patients suffering from gastric ulcers, 70% - 80% are H. pylori positive on rapid urease test of gastric biopsy at endoscopy [16, 17]. PUD has been associated with smoking, H. pylori infection, and chronic NSAID intake [18-20]. Numerous factors are implicated in the pathophysiology of gastric ulcer. These include smoking habits, alcohol consumption, coffee drinking, and familial occurrences of peptic ulcers in patients with a gastric or duodenal ulcer. Epidemiologic studies suggest that smokers are about twice as likely to develop gastric ulcers compare to non-smokers [21]. Bivariate analyses identified smoking, H. pylori infection, fasting, alcohol consumption, and chronic intake of NSAID as risk factors for gastric ulcer which is similar to the findings in other parts of the world.

 

 

Previously identified environmental risk factors for gastric ulcer development show a similar pattern in patients of the northern part of Ghana compared with other geographical regions of the world.

 

 

The authors declare no competing interests.

 

 

Stephen Tabiri: provided concept and design of the paper, revised the draft critically for important intellectual content and final approval of the version to be published. Prosper Akanbong: interpreted data and drafted the article. Braimah Abubakari: was in charge of acquisition of data and analysis. All the authors read the final manuscript.

 

 

Our sincere thanks go to the Healing the Children Organization, Louisville, KY, USA, which donated the video-endoscopy system to the Tamale Teaching Hospital. We are grateful to Dr. Ken Segoe for his immense contribution towards the establishment of the Minimal Access Therapy and Operative Endoscopy unit at the Tamale Teaching Hospital. Finally, we wish to express our sincere thanks to the chief executive officer of the Tamale Teaching Hospital his support, and Mr. Samuel Berko for helping with data collection.

 

 

Table 1: socio-demographic status, main symptoms, clinical diagnosis, endoscopy findings and Helicobacter pylori infection in patients with gastric ulcer

Table 2: environmental risks factors for development of gastric ulcer in patients in northern Ghana

Figure 1: questionnaires to identify risk factors of gastric ulcer

 

 

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