IERG Abstracrt Book.indd - LV Prasad Eye Institute

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40 Oral PresentationMethods: 20-item CES-D and 9-item PHQ-9 were administered to 236 participants (meanage, 39.5 years). Reliability and validity including dimensionality (using principal componentsanalysis, PCA) and differential item functioning (DIF) were assessed using Rasch analysis.Standard summary statistics of screening performance were calculated for Rasch-scaled scoresfor CES-D and PHQ-9 from Receiver-Operating Characteristic analysis including area underthe curve (AUC).Results: On PCA, the CES-D scale measured > 1 underlying trait (i.e. depression) so wedeleted items to restore unidimensionality. This resulted in a 4-item CES-D (CES-D-R)unidimensional scale that fulfilled the requirements of the Rasch model. The modified PHQ-9also showed adequate measurement precision with all items fitting the model and demonstratingunidimensionality. Participant’s level of depression was lower than that was assessed by itemsindicating the need for more items to suit lower levels of depression in both the questionnaires.Rasch scaled cut-off scores of -1.82 logits provided the largest AUC (0.97; 92% sensitivity) forCES-D-R compared to -0.86 logits for PHQ-9 (AUC 0.96; 90% sensitivity).Conclusions: Although the CES-D-R and the modified PHQ-9 are equally efficient measuresof screening for risk of depression, CES-D-R has significant advantages owing to its smallernumber of items leading to reduced respondent and administrator burden.IPT 017An Estimate of Patient Costs and Benefits of the New Primary Eye Care ModelUtilization Through Vision Centers in Andhra Pradesh, IndiaKovai VilasInternational Centre for Advancement of Rural Eye Care, LV Prasad Eye Institute, Hyderabad,India.Purpose: Little or no work has been carried out in developing countries on costs to patientsand patient benefits in accessing primary eye care services. The purpose of this study was toassess the indirect, direct, and overall costs of patients accessing vision care at Vision Centerservices (New Primary Eyecare Approach) as compared with the nearest private clinic.Methods: The authors used a standardized questionnaire and a paired sample t test to checkthe significance of difference of costs. They considered a P value of
IPT 018Oral Presentation41Sebaceous Gland Carcinoma: Risk factors for Recurrence, Exenteration, Metastasisand Death in 127 Consecutive Patients.Swathi Kaliki, Milind Naik, Santosh G. Honavar, Geeta K. VemugantiL V Prasad Eye Institute, Hyderabad, India.Purpose: To identify the risk factors that predict recurrence, exenteration, metastasis anddeath in sebaceous gland carcinoma (SGC).Methods: Retrospective case series.Results: Of 127 patients with SGC, 16% had tumor recurrence during a mean follow-up of117w. Kaplan-Meier (KM) estimate of recurrence was 34% at 5y. Perivascular or perineuralinvasion on histopathology (p=0.001) predicted recurrence. Orbital exenteration was performedin 22%. KM estimate of exenteration was 27% at 5y. Tumor recurrence (p=0.008) predictedexenteration. Metastasis occurred in 15%, and was estimated to be 17% in 5y. Ill-defined tumorpredicted metastasis (p=0.008). Death occurred in 12% and was estimated to be 25% at 5y.Tumor extension to periorbital areas was predictive of death (p=0.011).Conclusions: SGC has a high probability of recurrence and death. Early detection, meticulousplanning, surgical excision under frozen section control, and judicious adjuvant therapy mayimprove outcome.Paper Session IV, Cornea and Lens, July 31, 2010, 16.30 -18.00 hrsChairs: Perisamy Sundaresan and Prasanth GargIPT 019Evaluation of Corneal Elevation and Thickness Indices in Pellucid Marginal CornealDegeneration (PMCD) and Keratoconus (KCN)Shyam Sunder Tummanapalli, Preeji Mandathara, Vinod kumar Maseedupally, Varsha RathiCornea Service, L V Prasad Eye Institute, Hyderabad, India.Purpose: To determine and compare the corneal elevation and thickness indices betweenPMCD and Keratoconus eyes and formulating a reliable model to distinguish the PMCD fromKCN corneal morphology with Orbscan IIz parameters.Methods: In this initial model-building study, the anterior and posterior elevations wereanalyzed and compared retrospectively in 30 eyes of 20 PMCD patients(group I), 32 eyesof 32 Keratoconus patients(group II) and 30 eyes of 30 normal myopic patients(group III).The diagnosis of PMCD was based on the presence of corneal thinning with ectasia of thenormal cornea above the area of thinning with no evidence of scarring, vascularization, or lipiddeposition. The diagnosis of Keratoconus was based on any two clinical signs of Keratoconus.Results: The anterior and posterior best fit sphere (BFS), anterior elevation (AE), posteriorelevation (PE), anterior elevation ratio (AER), posterior elevation ratio (PER), Sim K values,
Page 1: th18 Annual MeetingJuly 31 - August
Page 5 and 6: Oral Presentation1Oral Presentation
Page 7 and 8: Oral Presentation3Session III: Comm
Page 9 and 10: Oral Presentation5Session V: Visual
Page 11 and 12: Oral Presentation714.30-14.45Sessio
Page 13 and 14: Lakshmi Priya JeganathanM MamataMan
Page 15 and 16: Poster Sessions11Poster Session 2Po
Page 17: Santanu JanaSomasheila MurthySouvik
Page 23 and 24: Invited Talks19patients. The work i
Page 25 and 26: GENZYME Lecture, July 31, 2010, 18.
Page 27 and 28: Invited Talks23of the mutant mice s
Page 29: Invited Talks25Invited talks, Sessi
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Page 37 and 38: Oral Presentation33Methods: 30 eyes
Page 39 and 40: IPT 009Oral Presentation35To Study
Page 41 and 42: IPT 012Oral Presentation37Animal Mo
Page 43: Oral Presentation39Purpose: To stud
Page 47 and 48: IPT 021Oral Presentation43Intraocul
Page 49 and 50: IPT 024Oral Presentation45Outcome o
Page 51 and 52: IPT 027Oral Presentation47Character
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Page 55 and 56: IPT 033Oral Presentation51AMD Genes
Page 57 and 58: IPT 036Oral Presentation53Ocular Ki
Page 59 and 60: IPT 039Oral Presentation55Surgical
Page 61: IPT 042Oral Presentation57Compariti
Page 65 and 66: Basic Poster SessionsPoster Session
Page 67 and 68: Basic Poster Sessions63Results: Ars
Page 69 and 70: IBP 008Basic Poster Sessions65Molec
Page 71 and 72: Basic Poster Sessions67when treated
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Page 77 and 78: Basic Poster Sessions73Purpose: To
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Page 83 and 84: Basic Poster Sessions79antibiotics
Page 85 and 86: Basic Poster Sessions81mucosal epit
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ICP 004Clinical Poster SessionsRefr
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Clinical Poster SessionsMethods: Re
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Clinical Poster Sessionsthree years
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Clinical Poster SessionsResults: Th
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ICP 016Clinical Poster SessionsMicr
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ICP 019Clinical Poster SessionsRota
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Clinical Poster Sessionsand explore
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ICP 026Vascular Inflammation - “I
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Clinical Poster Sessions35.85 ±9.8
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Clinical Poster SessionsResults: 8
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Clinical Poster SessionsPurpose: To
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ICP 040Clinical Poster SessionsComp
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ICP 043Clinical Poster SessionsStat
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L V Prasad Eye InstituteKallam Anji
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