Latent class trajectories of biochemical parameters and their relationship with risk of mortality in ICU among acute organophosphorus poisoning patients.

Acute poisoning is a global public health challenge. Several factors played role in high mortality among acute organophosphorus poisoning (OP) poisoning patients including clinical, vitals, and biochemical properties. The traditional analysis techniques use baseline measurements whereas latent profile analysis is a person-centered approach using repeated measurements. To determine varying biochemical parameters and their relationship with intensive care unit (ICU) mortality among acute organophosphorus poisoning patients through a latent class trajectory analysis. The study design was a retrospective cohort and we enrolled data of 299 patients admitted between Aug'10 to Sep'16 to ICU of Dr. Ruth K. M. Pfau, Civil Hospital, Karachi. The dependent variable was ICU-mortality among OP poisoning patients accounting for ICU stay, elapsed time since poison ingestion, age, gender, and biochemical parameters (including electrolytes (potassium, chloride, sodium), creatinine, urea, and random blood sugar). Longitudinal latent profile analysis is used to form the trajectories of parameters. In determining and comparing the risk of ICU-mortality we used Cox-Proportional-Hazards models, repeated measures and trajectories were used as independent variables. The patients' mean age was 25.4 ± 9.7 years and ICU-mortality was (13.7%, n = 41). In trajectory analysis, patients with trajectories (normal-increasing and high-declining creatinine, high-remitting sodium, normal-increasing, and high-remitting urea) observed the highest ICU-mortality i.e. 75% (6/8), 67% (2/3), 80% (4/5), 75% (6/8), and 67% (2/3) respectively compared with other trajectories. On multivariable analysis, compared with patients who had normal consistent creatinine levels, patients in normal-increasing creatinine class were 15 times [HR:15.2, 95% CI 4.2-54.6], and the high-declining class was 16-times [HR 15.7, 95% CI 3.4-71.6], more likely to die. Patients in with high-remitting sodium, the trajectory was six-times [HR 5.6, 95% CI 2.0-15.8], normal-increasing urea trajectory was four times [HR 3.9, 95% CI 1.4-11.5], and in extremely high-remitting urea trajectory was 15-times [HR 15.4, 95% CI 3.4-69.7], more likely to die compared with those who were in normal-consistent trajectories of sodium and urea respectively. Among OP poisoning patients an increased risk of ICU-mortality were significantly associated with biochemical parameters (sodium, urea, creatinine levels) using latent profile technique.

Trajectories of vital status parameters and risk of mortality among acute organophosphorus poisoning patients - a latent class growth analysis.

BACKGROUND: Acute organophosphorus (OP) poisoning is one of the major causes of mortality among patients presenting to emergency departments in developing countries. Although various predictors of mortality among OP poisoning patients have been identified, the role of repeated measurements of vital signs in determining the risk of mortality is not yet clear. Therefore, the present study examined the relationship between trajectories of vital signs and mortality among OP poisoning patients using latent class growth analysis (LCGA). METHODS: This was a retrospective cohort study using data for 449 OP poisoning patients admitted to Civil-Hospital Karachi from Aug'10 to Sep'16. Demographic data and vital signs, including body temperature, blood pressure, heart rate, respiratory rate, and partial-oxygen pressure, were retrieved from medical records. The trajectories of vital signs were formed using LCGA, and these trajectories were applied as independent variables to determine the risk of mortality using Cox-proportional hazards models. P-values of < 0.05 were considered statistically significant. RESULTS: Data for 449 patients, with a mean age of 25.4 years (range 13-85 years), were included. Overall mortality was 13.4%(n = 60). In trajectory analysis, a low-declining systolic blood pressure, high-declining heart rate trajectory, high-remitting respiratory rate trajectory and normal-remitting partial-oxygen pressure trajectory resulted in the greatest mortality, i.e. 38.9,40.0,50.0, and 60.0%, respectively, compared with other trajectories of the same parameters. Based on multivariable analysis, patients with low-declining systolic blood pressure were three times [HR:3.0,95%CI:1.2-7.1] more likely to die compared with those who had a normal-stable systolic blood pressure. Moreover, patients with a high-declining heart rate were three times [HR:3.0,95%CI:1.5-6.2] more likely to die compared with those who had a high-stable heart rate. Patients with a high-remitting respiratory rate were six times [HR:5.7,95%CI:1.3-23.8] more likely to die than those with a high-stable respiratory rate. Patients with normal-remitting partial oxygen pressure were five times [HR:4.7,95%CI:1.4-15.1] more likely to die compared with those who had a normal-stable partial-oxygen pressure. CONCLUSION: The trajectories of systolic blood pressure, heart rate, respiratory rate and partial-oxygen pressure were significantly associated with an increased risk of mortality among OP poisoning patients.

Unique side effects of interferon.

Interferon-alpha, a potent mediator of host immune response, has immunomodulatory properties in addition to its antiviral effects. A wide spectrum of autoimmune diseases can occur in patients treated with interferon-alpha for chronic hepatitis B and D, of which clinical systemic lupus erythematosus (SLE) accounts for less than 1% and hypothyroidism for 2-4 %. We report herein a case of a 16-year-old male who developed antinuclear antibody (ANA)-negative SLE and hypothyroidism after treatment with interferon-alpha for chronic hepatitis. High index of suspicion is therefore necessary in all patients treated with interferon for early diagnosis and treatment.

Hypothyroidism simulating as polymyositis.

Polymyositis-like syndrome in hypothyroidism is a rare condition characterised by proximal muscle weakness and elevated muscle enzymes. Patients with this condition can initially be misdiagnosed as having polymyositis due to similar characteristics of both diseases; however a response to thyroxine is the main differentiating feature. This report highlights the case of a 30-year-old male who had severe myalgia and proximal muscle weakness. In addition to raised creatinine phosphokinase (CPK) levels, his biochemical profile showed hypothyroidism. Initially thought to be suffering from polymyositis, improvement in both clinical and biochemical profile with thyroxine led to the diagnosis of polymyositis-like syndrome associated with hypothyroidism.

Insulin resistance in non-diabetic patients of chronic Hepatitis C.

OBJECTIVE: To determine insulin resistance in non-diabetic chronic hepatitis C patients using Homeostatic Model Assessment of Insulin Resistance (HOMA-IR). METHODOLOGY: Patients having anti-HCV positive were included in this study. Patients with diabetes mellitus, thyroid disease, hyperlipidemias, hypercortisolism and infective diseases other than hepatitis C were excluded. Age, weight, height and absence of diabetes were documented. Fasting blood glucose and fasting insulin levels were done. Body mass index and insulin resistance was calculated using the formulas. Patients having insulin resistance using formula HOMA-IR>2.5 were labeled as insulin resistant. Data was analyzed using SPSS-18. RESULTS: One hundred and fifty five patients according to sample size estimation were enrolled, in whom HOMA-IR was calculated, the mean value was found to be 2.47 ±1.30. A total of 79 (51%) of patients had HOMA-IR more than 2.5 showing insulin resistance. CONCLUSION: In a third world country like Pakistan, where there is a high prevalence of hepatitis C infection, the consequences of the disease are also very common. Insulin resistance was found in 51% of patients with chronic hepatitis C.

Frequency of dual tuberculosis/human immunodeficiency virus infection in patients presenting at tertiary care centers at karachi.

OBJECTIVE: To determine the frequency of dual infection of Tuberculosis and Human Immunodeficiency Virus (HIV) and document the sexual practices of infected patients. DESIGN: Cross-sectional study. PLACE AND DURATION OF STUDY: Medical Unit-IV of Civil Hospital, Karachi, Pakistan, in collaboration with Sindh AIDS Control Program at Services Hospital, Karachi, from January 2003 to December 2004. PATIENTS AND METHODS: Patients were recruited in the study at both centers and tested for both HIV and TB if any one disease was identified. Diagnosis of TB was based on positive sputum AFB smear / caseous granulomatous lesion on histopathology. Diagnosis of HIV was based on positive anti-HIV serology by LISA technique. A questionnaire was also administered to all the study participants regarding demographics, sexual practices, blood transfusion and intravenous drug abuse. RESULTS: A total of 196 patients of HIV and TB were screened for the presence of dual infection (TB/HIV). Dual infection was present in 38 (19.39%) of patients. Out of 126 patients of HIV, evidence of TB was detected in 38 (30.16%). During the same duration, 70 patients of tuberculosis were screened for HIV and none was tested positive for HIV. History of illicit sexual relationship was found in 121 (96.03%) patients and 5 of these were homosexuals. CONCLUSION: Dual infection was present in patients of HIV with TB but vice versa was not documented in this study.

Hemogolbin, ferritin, vitamin B12 and halicobacter pylori infection: a study in patients who underwent upper gi endoscopy at civil hospital karachi.

OBJECTIVE: To compare hemoglobin, ferritin, and vitamin B12 levels in patients undergoing upper GI endoscopy according to their Helicobacter pylori status. STUDY DESIGN: Cross-sectional study. Place and Duration of the Study: Civil Hospital and Lyari General Hospitals, Karachi, from March 2004 to June 2006. PATIENTS AND METHODS: All patients undergoing upper GI Endoscopy were selected, while patients of active peptic ulcers, malignancy, varices, malabsorption and recent blood donation were excluded. Blood samples for CBC, serum ferritin and vitamin B12 were collected and H.pylori status was ascertained by urease test on gastric biopsy. Differences in mean values of age, ferritin, hemoglobin, MCV and vitamin B12 were done by student's 't-test'. Significant confounding factors were identified on multivariate analysis and were further analyzed by univariate analysis. RESULTS: Two hundred and eighty-five subjects were studied, including 171 males and 114 females. H.pylori was positive in 214 (75.1%) patients. Significantly low levels of hemoglobin (p =0.0), ferritin (p = 0.0) and vitamin B12 (p = 0.0) were found in patients with H. pylori infection. Gender, menopause, contraception and history of peptic ulcer disease were identified as significant confounders. CONCLUSIONS: Significantly low levels of hemoglobin, ferritin and vitamin B12 were found in patients with H.pylori infection.

Comparison of heart rate and QTc duration in patients of cirrhosis of liver with non-cirrhotic controls.

OBJECTIVE: To compare QTc duration and Heart Rate (HR) in patients with cirrhosis with non-cirrhotic controls. DESIGN: Cross-sectional analytical study. PLACE AND DURATION OF STUDY: Civil Hospital and Lyari General Hospital, Karachi, from March 2004 to February 2006. PATIENTS AND METHODS: Confirmed patients of cirrhosis were selected and allocated to Group-I. An equal number of non-cirrhotic patients were taken as control and were allocated to Group-II. ECG was recorded and values of HR and QTc were calculated. Comparison of increased frequency of HR and prolongation of QTc were done using Chi-square test or Fisher's Exact Test with significance level at

Correlation of quality of life in patients of cirrhosis of liver with etiology and disease severity using disease-specific quality of life questionnaire.

BACKGROUND: Quality of Life has an important status in patient management suffering from chronic disease like cirrhosis and health related quality of life has significant impact on patient management. This study was conducted to evaluate the correlation of health related quality of life with disease severity in patients of cirrhosis of liver. METHODS: This cross-sectional study was conducted at Medical Unit-IV, Dow University of Health Sciences, Karachi, during the period January 2006 to October 2006. All patients of cirrhosis of liver admitted during the study period were selected. Patients with encephalopathy, hepatocellular carcinoma were excluded. The 29 item chronic liver disease questionnaire (CLDQ) was administered to the patients by a postgraduate trainee. Internal validity of responses was checked statistically and correlation of responses was done with disease severity by Child-Pughs Criteria. RESULTS: 109 patients were selected with 72 males and 37 females. Patient classification according to Child class A, B & C was 30, 38 & 41 respectively. The mean CLDQ score in the patients was 89.5 +/- 30.4. It correlated significantly with Child Class but did not correlate with the gender, age and etiology of cirrhosis. CONCLUSION: Health related CLDQ scores correlate with the severity of liver disease.

Frequency and comparative analysis of hapatitis D in petients seeking treatment for hepatitis B.

OBJECTIVE: To find the frequency of hepatitis 'D' in patients of hepatitis 'B' seeking treatment and to compare clinical and biochemical features in patients harboring HDV with those who are not. DESIGN: Cross-sectional study. PLACE AND DURATION OF STUDY: Medical Unit-IV, Civil Hospital Karachi, Medical Unit-VI and Surgical Unit-VII, Lyari General Hospital, Dow University of Health Sciences, Karachi; from July 2003 to June 2005. PATIENTS AND METHODS: HBsAg positive patients seeking treatment were enrolled in the study. Anti-HDV was done in all. Patients were split into two groups according to their anti-HDV status into HDV positive and HDV negative groups. Liver biochemistries and viral profile for HCV, anti-HBc IgM and HBeAg were done and compared between the two groups. RESULTS: A total of 246 patients were selected. HDV was positive in 66 (26.8%) patients. No significant difference was observed in the frequency and stages of cirrhosis between the two groups while significant differences were observed in the mean SGPT (95% CI: -381.09 to -110.74; P = 0.001) and albumin levels (95% CI: 1.87 to 7.73; P = 0.007) and in the frequency of HBeAg (P = 0.001), anti-HBc IgM (P = 0.02) and HBV DNA (P<0.001). CONCLUSION: HDV infection was common in patients with HBV in this cohort of patients. All patients of HBV should be screened for HDV before treatment decision for the former is taken.