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Featured researches published by Amna Khan.


Diabetes Care | 2013

Randomized Study Comparing a Basal Bolus With a Basal Plus Correction Insulin Regimen for the Hospital Management of Medical and Surgical patients With Type 2 Diabetes: Basal Plus Trial

Guillermo E. Umpierrez; Dawn Smiley; Kathie L. Hermayer; Amna Khan; Darin E. Olson; Christopher A. Newton; Sol Jacobs; Monica Rizzo; Limin Peng; David Reyes; Ingrid Pinzon; Maria Fereira; Vicky Hunt; Ashwini P. Gore; Marcos Toyoshima; Vivian Fonseca

OBJECTIVE Effective and easily implemented insulin regimens are needed to facilitate hospital glycemic control in general medical and surgical patients with type 2 diabetes (T2D). RESEARCH DESIGN AND METHODS This multicenter trial randomized 375 patients with T2D treated with diet, oral antidiabetic agents, or low-dose insulin (≤0.4 units/kg/day) to receive a basal-bolus regimen with glargine once daily and glulisine before meals, a basal plus regimen with glargine once daily and supplemental doses of glulisine, and sliding scale regular insulin (SSI). RESULTS Improvement in mean daily blood glucose (BG) after the first day of therapy was similar between basal-bolus and basal plus groups (P = 0.16), and both regimens resulted in a lower mean daily BG than did SSI (P = 0.04). In addition, treatment with basal-bolus and basal plus regimens resulted in less treatment failure (defined as >2 consecutive BG >240 mg/dL or a mean daily BG >240 mg/dL) than did treatment with SSI (0 vs. 2 vs. 19%, respectively; P < 0.001). A BG <70 mg/dL occurred in 16% of patients in the basal-bolus group, 13% in the basal plus group, and 3% in the SSI group (P = 0.02). There was no difference among the groups in the frequency of severe hypoglycemia (<40 mg/dL; P = 0.76). CONCLUSIONS The use of a basal plus regimen with glargine once daily plus corrective doses with glulisine insulin before meals resulted in glycemic control similar to a standard basal-bolus regimen. The basal plus approach is an effective alternative to the use of a basal-bolus regimen in general medical and surgical patients with T2D.


Diabetes Care | 2014

Hospital Discharge Algorithm Based on Admission HbA1c for the Management of Patients With Type 2 Diabetes

Guillermo E. Umpierrez; David Reyes; Dawn Smiley; Kathie L. Hermayer; Amna Khan; Darin E. Olson; Francisco J. Pasquel; Sol Jacobs; Christopher A. Newton; Limin Peng; Vivian Fonseca

OBJECTIVE Effective treatment algorithms are needed to guide diabetes care at hospital discharge in general medicine and surgery patients with type 2 diabetes. RESEARCH DESIGN AND METHODS This was a prospective, multicenter open-label study aimed to determine the safety and efficacy of a hospital discharge algorithm based on admission HbA1c. Patients with HbA1c <7% (53.0 mmol/mol) were discharged on their preadmission diabetes therapy, HbA1c between 7 and 9% (53.0–74.9 mmol/mol) were discharged on a preadmission regimen plus glargine at 50% of hospital daily dose, and HbA1c >9% were discharged on oral antidiabetes agents (OADs) plus glargine or basal bolus regimen at 80% of inpatient dose. The primary outcome was HbA1c concentration at 12 weeks after hospital discharge. RESULTS A total of 224 patients were discharged on OAD (36%), combination of OAD and glargine (27%), basal bolus (24%), glargine alone (9%), and diet (4%). The admission HbA1c was 8.7 ± 2.5% (71.6 mmol/mol) and decreased to 7.3 ± 1.5% (56 mmol/mol) at 12 weeks of follow-up (P < 0.001). The change of HbA1c from baseline at 12 weeks after discharge was −0.1 ± 0.6, −0.8 ± 1.0, and −3.2 ± 2.4 in patients with HbA1c <7%, 7–9%, and >9%, respectively (P < 0.001). Hypoglycemia (<70 mg/dL) was reported in 22% of patients discharged on OAD only, 30% on OAD plus glargine, 44% on basal bolus, and 25% on glargine alone and was similar in patients with admission HbA1c ≤7% (26%) compared with those with HbA1c >7% (31%, P = 0.54). CONCLUSIONS Measurement of HbA1c on admission is beneficial in tailoring treatment regimens at discharge in general medicine and surgery patients with type 2 diabetes.


The Journal of Clinical Endocrinology and Metabolism | 2013

Prevalence and Predictors of Low Bone Mineral Density in Males With Ulcerative Colitis

Nabeel Khan; Ali Abbas; R. M. Almukhtar; Amna Khan

CONTEXT Low bone mineral density (BMD) is common in patients with inflammatory bowel diseases. OBJECTIVE The objective of the study was to assess the prevalence and the predictors of low BMD (osteoporosis or osteopenia) and fragility fractures among men with ulcerative colitis. DESIGN This was a retrospective database analysis. SETTING The study was conducted at a nationwide Veterans Affairs health care system. PATIENTS Male ulcerative colitis patients who were followed up in the Veterans Affairs system between 2001 and 2011 were identified using the International Classification of Diseases, ninth revision (ICD-9). MAIN OUTCOME MEASURES We identified patients with low BMD and fragility fractures using ICD-9 codes. Steroid exposure was assessed using pharmacy data. A multivariate analysis was used to identify the independent effect of systemic steroids on the risk of low BMD and fragility fractures. RESULTS We identified 34 665 patients. Among them, 31% used steroids. The prevalence of low BMD was 15.8% and 7.1% among those who used and did not use steroids, respectively (P < .001). Prevalence of fragility fractures was 7.9%, 4.4%, and 1.1% for those with osteoporosis and osteopenia and those without low BMD, respectively (P < .001). Steroid exposure showed a dose-response pattern, patients who had cumulative prednisone exposure of greater than 11 136 mg (10th decile) were more likely to develop low BMD (odds ratio 8.9, P < .001) and fragility fractures (odds ratio 1.8, P < .001) as compared with non-steroid users after controlling for other possible predictors. CONCLUSION In this nationwide cohort, the prevalence of low BMD was higher than what was reported for the general male population. There was a strong correlation between the cumulative steroid use and the risk of low BMD. Both steroids and low BMD were independent risk factors for fragility fractures.


Thyroid | 2010

Primary Peripheral Nerve Sheath Tumors of the Thyroid Gland

Emad Kandil; Mohammed Abdel Khalek; Obai Abdullah; Dali Dali; Sabeen Faruqui; Amna Khan; Paul Friedlander; Bernard M. Jaffe; Byron Crawford

BACKGROUND Primary peripheral nerve sheath tumors (PNSTs) of the thyroid gland are exceptionally rare tumors that usually present as asymptomatic neck nodules in adults. This article presents a literature review of these tumors. SUMMARY PNSTs of the thyroid can be classified into benign and malignant. Only three cases of malignant PNSTs have been reported. Benign PNSTs of the thyroid include neurofibromas and schwannomas. Only two cases of isolated neurofibroma of the thyroid have been reported. Schwannomas are typically benign, slow-growing tumors that originate from neuronal schwann cells, with a clinical picture depending on the anatomic size and site. Pathologically, schwannomas are classified into Antoni A and Antoni B. Only 17 cases of schwannomas of the thyroid exist in literature to date. CONCLUSIONS Schwannomas of the thyroid gland are extremely rare and usually asymptomatic. Complete surgical resection is mandatory for care.


Journal of Diabetes and Its Complications | 2013

Differences in inpatient glycemic control and response to subcutaneous insulin therapy between medicine and surgery patients with type 2 diabetes

Dawn Smiley; Guillermo E. Umpierrez; Kathie L. Hermayer; Christopher A. Newton; Sol Jacobs; Darin E. Olson; Amna Khan; Monica Rizzo; Limin Peng; David Reyes; Saumeth Cardona; Vivian Fonseca

OBJECTIVE To determine differences in inpatient glycemic control and response to two different glargine-based insulin regimens in general medicine and surgery patients with type 2 diabetes (T2D). METHODS This is a post-hoc analysis of a prospective, multicenter, randomized trial of 298 non-ICU medicine and surgery patients with T2D treated with Basal Bolus regimen with glargine once daily and glulisine before meals and with Basal Plus regimen with glargine once daily and supplemental doses of glulisine before meals for blood glucose (BG)>140mg/dl. Major study outcomes included differences in mean daily BG, frequency of treatment failures (defined as >2 consecutive BG>240mg/dl or a mean daily BG>240mg/dl), and hypoglycemia between the medicine and surgery cohorts. RESULTS Patients treated with Basal Bolus or with Basal Plus experienced similar improvement in mean daily BG after 1st day of therapy (p=0.16), number of treatment failures (p=0.11) and hypoglycemic events (p=0.50). Compared to surgery patients (n=130), medicine patients (n=168) had higher admission BG (p=0.01) and HbA1c levels (p<0.01); however, they had similar response to either treatment regimen without differences in mean daily BG after 1st day of therapy (p=0.18), number of treatment failures (p=0.58), daily insulin requirements (p=0.36), or in the frequency of hypoglycemia (p=0.79). CONCLUSION The Basal Plus regimen with glargine once daily and correction doses with glulisine before meals resulted in similar glycemic control to basal bolus regimen. We observed no differences in response to either basal insulin regimen between medicine and surgery patients with type 2 diabetes.


The American Journal of Gastroenterology | 2014

Adherence and Efficacy of Screening for Low Bone Mineral Density Among Ulcerative Colitis Patients Treated With Corticosteroids

Nabeel Khan; Ali Abbas; Rawaa M Almukhtar; Elisabeth B. Cole; Amna Khan

OBJECTIVES:Ulcerative colitis (UC) is associated with an increased risk of metabolic bone disease and fragility fractures. The aim of this study was to assess the adherence to the guidelines issued by the American Gastroenterology Association (AGA) for the screening for low bone density in UC patients and to assess the benefits of dual-energy X-ray absorptiometry (DXA) screening among corticosteroid (CS)-treated UC patients.METHODS:Nationwide Veterans Affairs system (VA) data were obtained. UC patients followed up in the VA between 2001 and 2011 and the occurrence of fragility fractures were identified using International Classification of Diseases, Ninth Revision codes. Exposure to CSs was assessed using pharmacy data. DXA screening was assessed using the VA procedure database. Post DXA screening, medication use was also assessed from the pharmacy database. Cox regression analysis was performed to calculate the hazard ratio (HR) of fragility fractures among those patients who received DXA compared with those who did not.RESULTS:We included 5,736 patients. Among them, 80 (1.4%) patients suffered from fragility fractures during the follow-up period. Overall adherence rate to AGA guidelines was 23%. Adherence rate was highest among postmenopausal women (48%) and lowest among men above 50 years of age (20%). UC patients who received DXA screening were more likely to be started on bisfosfonates (P<0.001), calcitonin (P<0.001), vitamin D, and calcium (P<0.001) compared with those who did not receive screening. Those who received DXA screening were half as likely (HR=0.5, 0.3–0.9, P=0.03) to develop fragility fractures as compared with those who did not receive screening. The benefits were more prominent among those with higher CS exposure.CONCLUSIONS:Rates of DXA screening were low among CS-treated UC patients. Those who received DXA screening were more likely to be started on antiresorptive therapy and supplemental medications and had a 50% reduction in the risk of fragility fractures. More efforts should be directed toward raising the adherence to AGA guidelines and the awareness of DXA benefits.


Evidence-based Medicine | 2010

Adding subcutaneous liraglutide to metformin reduces HbA1c more than adding oral sitagliptin in patients whose type 2 diabetes is poorly controlled with metformin alone.

Vivian Fonseca; Cyrus V. Desouza; Amna Khan

Commentary on: PratleyRENauckMBaileyT.; 1860-LIRA-DPP-4 Study Group. Liraglutide versus sitagliptin for patients with type 2 diabetes who did not have adequate glycaemic control with metformin: a 26-week, randomised, parallel-group, open-label trial. Lancet 2010;375:1447–56.


Operations Research Letters | 2015

Thyroid Cancer in Black Thyroid Glands: The Effect of Age and Race

Yasin Ibrahim; Byron Crawford; Mohammad Murci; Hammad Masoodi; Amna Khan; Tian Hu; Emad Kandil; Paul Friedlander

Background: Black thyroid pigmentation is a rare entity. The risk of malignancy is higher in black thyroid compared to non-black thyroid glands. We aimed to examine the effect of age and race on the risk of malignancy in black thyroid glands. Methods: We identified a series of consecutive patients who underwent thyroidectomy at an academic institution between January 1998 and May 2013. Patient demographics, clinical characteristics, and histopathology data were reviewed. Results: Among 925 patients who underwent thyroidectomy, 112 (12.1%) patients with black thyroid glands were identified. The incidence of thyroid cancer was 55.4% in black thyroid glands compared to 32.8% in non-black thyroid glands (p < 0.0001). The incidence of papillary thyroid cancer among the black and non-black thyroid glands was 34.8 and 20%, respectively (p < 0.001). The mean age (±SD) for patients with black thyroid glands and those with non-black thyroid was 54.3 ± 12.8 and 51.2 ± 15.7 years, respectively (p = 0.05). Black thyroid glands were also associated with a higher incidence of microcarcinomas (76 vs. 59%, p = 0.02). Among patients with black thyroid glands, Caucasians had a higher malignancy rate (63.4%) than African-Americans (37%; p = 0.03). Conclusion: The incidence of malignancy is higher in black thyroid compared to non-black thyroid glands, specifically in Caucasians.


Annals of Otology, Rhinology, and Laryngology | 2013

Thyroid hormone replacement therapy, surveillance ultrasonography, and fine-needle aspiration after hemithyroidectomy.

Salem I. Noureldine; Amna Khan; Saleh A. Massasati; William Kethman; Emad Kandil

Objectives: We undertook a retrospective analysis of a single surgeons experience at a tertiary care teaching hospital to determine the rates of surveillance ultrasound, fine-needle aspiration (FNA), and the need for thyroid hormone replacement therapy (THRT) after hemithyroidectomy. Methods: The study population comprised 120 consecutive patients who underwent hemithyroidectomy by one surgeon from January 2008 to June 2011. The medical records were reviewed for preoperative and postoperative calcium levels, fiberoptic direct laryngoscopy examination of vocal fold mobility, postoperative complications, final pathology, and postoperative follow-up. Results: Fifteen patients required completion thyroidectomy for malignancy and were excluded from the surveillance analysis. Of the remaining 105 patients, 10 (9.5%) required postoperative THRT. The likelihood for THRT was significantly associated with increased age (p = 0.01) and the presence of thyroiditis (p = 0.04). Other factors, such as gender, body mass index, residual thyroid volume, and presence of contralateral lobe nodules, were not significantly associated with this likelihood (p > 0.05). Twenty-three patients (21.9%) were followed with surveillance ultrasound, of whom 12 (11.4%) underwent FNA for nodule(s) in the contralateral lobe. Seventy-eight percent of patients did not require any long-term postoperative surveillance. There were no instances of permanent recurrent laryngeal nerve injury or hypoparathyroidism. Conclusions: Hemithyroidectomy is an effective and efficient option for the management of benign and suspicious thyroid nodules. However, patients of increased age and/or with thyroiditis are at higher risk for postoperative hypothyroidism, and should be counseled to consider total thyroidectomy to avoid the need for long-term surveillance and the possible need for a second operation.


The Journal of Clinical Endocrinology and Metabolism | 2018

Gestational Gigantomastia Complicated by PTHrP-mediated Hypercalcemia.

Taher Modarressi; Michael A Levine; Julia Tchou; Amna Khan

Context Gestational gigantomastia is an uncommon condition characterized by abnormal and excessive growth of breast tissue during an otherwise uncomplicated pregnancy. Gestational gigantomastia may be accompanied by hypercalcemia, which in some cases has been associated with elevated serum levels of PTHrP. The source of the PTHrP in these cases has been suggested to be the enlarged breasts. Objective To describe the rapid resolution of hypercalcemia and normalization of serum PTHrP after elective termination of pregnancy, indicating that the placenta was the source of the PTHrP. Design A retrospective analysis of clinical and biochemical data over a 2-year interval and review of literature. Setting An academic medical center. Patient A 33-year-old G8P4 female who presented at week 8 of pregnancy with gestational gigantomastia and subsequently developed marked hypercalcemia at week 13. Serum levels of PTH were suppressed but circulating PTHrP was elevated. There was no history of hypercalcemia or significant breast growth during previous pregnancies. Intervention Hypercalcemia was poorly responsive to IV saline, prednisone, calcitonin, and cinacalcet. She requested termination of pregnancy at week 20. Results Serum levels of calcium, PTH, and PTHrP normalized within 48 hours of termination of pregnancy. Conclusion The rapid resolution of hypercalcemia after termination of pregnancy, despite persistent gigantomastia, provides evidence for a pathologic role of the placenta in the excess production of PTHrP, possibly through an as yet uncharacterized placenta-breast hormonal axis.

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Kathie L. Hermayer

Medical University of South Carolina

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