Okpa HO, Bisong EM, Enang OE, Monjok E, Essien EJ: Predictors of Hypertension in an Urban HIV - infected population at the University of Calabar Teaching Hospital, Calabar, Nigeria. HIV/AIDS - Research and Palliative Care 2017:9: 19–24
Effa EE, Okpa HO, Arije A, Salako BL, Kadiri S. A non-functioning left kidney from renal tuberculosis and a review of literature. Nigerian Journal of Medicine. 2017. 26(4); 375-8
Uduak E. Williams, Elvis Bisong, Henry O. Okpa, Estella Ohio, Mc Steve Okeke. Cognitive and Mood Impairment among HIV Seropositive Patients in A Special Treatment Clinic. SAS J Med 2017; 3(8); 211-217.
Elvis Mbu Bisong, Uduak Effiong Williams, Henry Ohem Okpa,Ofem Egbe Enang, Emmanuel Monjok. Predictors of Sleep Disorders among HIV Out-Patients in a Tertiary Hospital. Recent Advances in Biology and Medicine, 2017; 3:103-109. ID: 509325 https://doi.org/10.18639/RABM.2017.03.509325
Okpa HO, Oviasu E, Ojogwu LI. Assessment of the relationship of Cd4 count levels with lipid profile and atherogenic index of plasma among newly diagnosed HIV patients in a tertiary hospital in Nigeria. IOSR Journal of Dental and Medical Sciences (IOSR JDMS); 2016; 15(8): 65 – 70. Doi: 10.9790/0853 – 1508066570.
Bisong EM, Okpa HO, Udonwa NE. Clinico – demographic profile of participants in a medical screening exercise in urban region, South – South Nigeria. Journal of Medicine in Africa, 2016; 1(1):1 – 5.
Enang OE, Okpa HO, Bisong EM, Fasanmade OA, Ohwovoriole AE. Socio – demographic indices of health workers in a tertiary institution in Nigeria. Journal of Medicine in Africa, 2016; 1(1):14 – 21.
Okpa HO, Oviasu E, Ojogwu LI. Microalbuminuria and its Relationship with Clinical and Biochemical Parameters in Newly Diagnosed HIV Patients in a Tertiary Hospital South-South Nigeria. World J. Med. Sci. 2015; 12(2): 83 – 90
Okpa HO, Enang EO, Effa EE, Essien EO, Mbu PN. Comparative Analysis Of Atherogenic Index Of Plasma And Its Relationship With Cardiovascular Risk Among Patients With Diabetes Mellitus And Concurrent Diabetes Mellitus With Hypertension Attending Endocrinology Clinic In A Tertiary Hospital South- South Nigeria. IOSR Journal of Dental and Medical Sciences 2015; 14(8): 102 – 107.
Effa EE, Okpa HO, Mbu PN, Epoke JE, Otokpa DE. Acute Kidney Injury in Hospitalized patients at the University of Calabar Teaching Hospital: An aetiological and outcome study.IOSR Journal of Dental and Medical Sciences 2015; 14(3): 55 – 59.
Umoh VA, Otu AA, Okpa HO, Effa EE. The Pattern of Respiratory Disease Morbidity and Mortality in a Tertiary Hospital in Southern-Eastern Nigeria. Pulmonary Medicine 2013; Volume 2013: Article ID 581973. http://dx.doi.org/10.1155/2013/581973
Essien OE, Otu AA, Odigwe CC, Umoh VA, Okpa HO. Awareness and utilization of haemoglobin A1c estimation as a glycaemic monitoring tool in persons with diabetes by medical practitioners in Calabar, Nigeria: a clinical practice audit. Mary Slessor Journal of Medicine 2013; 12(1): 1-10.
Otu AA, Umoh VA, Essien OE, Enang OE, Okpa HO, Mbu PN. Profile, bacteriology, and risk factors for foot ulcers among diabetics in a tertiary hospital in Calabar, Nigeria. Ulcers 2013; Article ID 820468.
Bisong EM, Okpa HO, Ogbonna UK, Enang EO, Monjok M. The prevalence and risk factors associated with anaemia among HIV patients attending clinic at the University of Calabar Teaching Hospital, Calabar, Nigeria. Global Journal of Pure and Applied Sciences, 2017; 23(1): 187 – 192.
Uhegbu VM, Ansa VO, Okpa HO, Enang OE, Odigwe CO. The Predictors of Left Ventricular Dysfunction Among Hypertensive And Diabetic -Hypertensive Patients in ATertiary Hospital in Nigeria. IOSR Journal of Dental and Medical Sciences 2017; 16(9): 64 – 70.
Bisong EM, Offiong ME, Okpa HO, Mgbe RB, Enang OE, Monjok E.The Pattern, Risk Factors And Predictors of Oral Manifestations of HIV Among Highly Active Antiretroviral Therapy Naive Patients. IOSR Journal of Dental and Medical Sciences 2017; 16(7): 96 – 101