1. Xie X, Ren K, Zhou Z, Dang C, Zhang H. The global, regional and national burden of peptic ulcer disease from 1990 to 2019: a population-based study. BMC Gastroenterol. 2022; 22(1): 58.doi:10.1186/s12876-022-02130-2 PMid:35144540 PMCid:PMC8832644

2. Ren J, Jin X, Li J, Li R, Gao Y, Zhang J, et al. The global burden of peptic ulcer disease in 204 countries and territories from 1990 to 2019: a systematic analysis for the Global Burden of Disease Study 2019. Int J Epidemiol. 2022; 51(5):1666-76. doi:10.1093/ije/dyac033 PMid:35234893

3. Lau JY, Sung J, Hill C, Henderson C, Howden CW, Metz DC. Systematic review of the epidemiology of complicated peptic ulcer disease: incidence, recurrence, risk factors and mortality. Digestion. 2011; 84(2): 102-13. doi:10.1159/000323958 PMid:21494041

4. Mahlefahlo MT, Montwedi OD, Karusseit VOL. Perforated peptic ulcer - a case series and an African perspective. S Afr J Surg. 2024; 62(1): 66-71. doi:10.36303/SAJS.00161 PMid:38568129

5. Bupicha JA, Gebresellassie HW, Alemayehu A. Pattern and outcome of perforated peptic ulcer disease patient in four teaching hospitals in Addis Ababa, Ethiopia: a prospective cohort multicenter study. BMC Surg. 2020; 20(1):135. doi:10.1186/s12893-020-00796-7 PMCid:PMC7296920

6. Gbenga OJ, Ayokunle DS, Ganiyu A, Adekoya I. Pattern of Presentation, Management and Early Outcome in Patients with Perforated Peptic Ulcer Disease in a Semi-urban Tertiary Hospital. Ethiop J Health Sci. 2021;31(5):975-84. doi:10.4314/ejhs.v31i5.9 PMCid:PMC8843151

7. Seyoum N, Ethicha D, Assefa Z, Nega B. Risk Factors that Affect Morbidity and Mortality in Patients with Perforated Peptic Ulcer Diseases in a Teaching Hospital. Ethiop J Health Sci. 2020; 30(4): 549-58. doi:10.4314/ejhs.v30i4.10 PMid:33897215 PMCid:PMC8054450

8. Dakubo JC, Naaeder SB, Clegg-Lamptey JN. Gastro-duodenal peptic ulcer perforation. East Afr Med J. 2009;86(3):100-9. doi:10.4314/eamj.v86i3.54964 PMid:19702096

9. Choi YS, Heo YS, Yi JW. Clinical Characteristics of Primary Repair for Perforated Peptic Ulcer: 10-Year Experience in a Single Center. J Clin Med. 2021; 10(8). doi:10.3390/jcm10081790 PMid:33924059 PMCid:PMC8073572

10. Boyd-Carson H, Doleman B, Cromwell D, Lockwood S, Williams JP, Tierney GM, et al. Delay in Source Control in Perforated Peptic Ulcer Leads to 6% Increased Risk of Death Per Hour: A Nationwide Cohort Study. World J Surg. 2020; 44(3): 869-75. doi:10.1007/s00268-019-05254-x PMid:31664496

11. Yamamoto K, Takahashi O, Arioka H, Kobayashi D. Evaluation of risk factors for perforated peptic ulcer. BMC Gastroenterol. 2018; 18(1): 28. doi:10.1186/s12876-018-0756-4 PMid:29448921 PMCid:PMC5815199

12. Shreya A, Sahla S, Gurushankari B, Shivakumar M, Rifai, Kate V, et al. Spectrum of perforated peptic ulcer disease in a tertiary care hospital in South India: predictors of morbidity and mortality. ANZ J Surg. 2024; 94(3): 366-70. doi:10.1111/ans.18831 PMid:38115644

13. Ali AM, Mohamed AN, Mohamed YG, Kelesoglu SI. Clinical presentation and surgical management of perforated peptic ulcer in a tertiary hospital in Mogadishu, Somalia: a 5-year retrospective study. World J Emerg Surg. 2022; 17(1): 23. doi:10.1186/s13017-022-00428-w PMid:35578285 PMCid:PMC9112500

14. Hernandez MC, Thorn MJ, Kong VY, Aho JM, Jenkins DH, Bruce JL, et al. Validation of the AAST EGS grading system for perforated peptic ulcer disease. Surgery. 2018; 164(4): 738-45.doi:10.1016/j.surg.2018.05.061 PMid:30082138

15. Sayehmiri K, Abangah G, Kalvandi G, Tavan H, Aazami S. Prevalence of peptic ulcer in Iran: Systematic review and meta-analysis methods. J Res Med Sci. 2018; 23: 8. doi:10.4103/jrms.JRMS_1035_16 PMid:29456565 PMCid:PMC5813297

16. Li CH, Chang WH, Shih SC, Lin SC, Bair MJ. Perforated peptic ulcer in southeastern Taiwan. J Gastroenterol Hepatol. 2010; 25(9):1 530-6.doi:10.1111/j.1440-1746.2010.06348.x PMid:20796151

17. Turan B, Eroglu H, Sultanoglu B, Demirbakan K. Methamphetamine-related peptic ulcer perforation: a growing medical concern. Ulus Travma Acil Cerrahi Derg. 2023; 29(12): 1357-63. doi:10.14744/tjtes.2023.53146 PMid:38073456 PMCid:PMC10767286

18. Narayanan M, Steinheber FU. The changing face of peptic ulcer in the elderly. Med Clin North Am. 1976; 60(6): 1159-72. doi:10.1016/S0025-7125(16)31873-9 PMid:790045

19. Tadesse M, Musie E, Teklewold B, Hailu E. Prevalence of H. Pylori in Perforated Peptic Ulcer Disease at Saint Paul's Hospital Millennium Medical College, Addis Ababa, Ethiopia. Ethiop J Health Sci. 2021; 31(5):969-74. doi:10.4314/ejhs.v31i5.8 PMCid:PMC8843141

20. Choi YJ, Kim TJ, Bang CS, Lee YK, Lee MW, Nam SY, et al. Changing trends and characteristics of peptic ulcer disease: A multicenter study from 2010 to 2019 in Korea. World J Gastroenterol. 2023; 29(44): 5882-93. doi:10.3748/wjg.v29.i44.5882 PMCid:PMC10725564