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Mean Score Differences (mean + score_difference)
Selected AbstractsAssociation Between Apolipoprotein E4 and Cognitive Decline in Elderly AdultsJOURNAL OF AMERICAN GERIATRICS SOCIETY, Issue 11 2007Chris J. Packard DSc OBJECTIVE: To determine the influence of apolipoprotein E on cognitive decline in a cohort of elderly men and women. DESIGN: Prospective study. SETTING: Scotland, Ireland, and the Netherlands. PARTICIPANTS: Five thousand eight hundred four subjects aged 70 to 82 from the Prospective Study of Pravastatin in the Elderly at Risk (PROSPER). MEASUREMENTS: Subjects were assessed at baseline and over a mean 3.2-year (range 0.7,4.2) follow-up for memory (Picture-Word Recall), speed of information processing (Stroop and Letter-Digit Coding), global cognitive function (Mini-Mental State Examination), and activities of daily living. RESULTS: At baseline, subjects with apolipoprotein E4 versus those without E4 had poorer memory performance (mean score difference ,0.20 (95% confidence interval (CI)=,0.31 to ,0.09) for immediate recall and ,0.32 (95% CI=,0.48 to ,0.16) for delayed recall and slower information processing (difference in Stroop, 2.79 seconds, (95% CI=1.20,4.28); Letter-Digit score, ,0.36, (95% CI=,0.77,0.05). Subjects with apolipoprotein E4 showed a greater decline in immediate (,0.22, 95% CI=,0.33 to ,0.11) and delayed (,0.30, 95% CI=,0.46 to ,0.15) memory scores but no significant change in speed of information processing (Stroop, P=.17; Letter-Digit, P=.06). Memory scores decreased 2.5% from baseline in those without E4, 4.3% in E4 heterozygotes (P=.01 for immediate and P=.03 for delayed, vs no E4) and 8.9% to 13.8% in E4 homozygotes (P=.04 for immediate and P=.004 for delayed, vs heterozygotes). Apolipoprotein E4 was associated with greater decline in instrumental activities of daily living (P<.001). Cognitive decline was not associated with lipoprotein levels. CONCLUSION: Findings in PROSPER indicate that E4 is associated with more-rapid cognitive decline and may, therefore, predispose to dementia. [source] Long-term health-related quality of life following surgery for oesophageal cancerBRITISH JOURNAL OF SURGERY (NOW INCLUDES EUROPEAN JOURNAL OF SURGERY), Issue 9 2008T. Djärv Background: The aim of the study was to assess health-related quality of life (HRQL) in patients with surgically cured oesophageal cancer. Methods: A Swedish nationwide cohort of patients undergoing oesophagectomy for cancer between April 2001 and January 2004 was studied prospectively, and compared with a Swedish age- and sex-adjusted reference population. Validated European Organisation for Research and Treatment of Cancer quality of life questionnaires were used to assess HRQL at 6 months and 3 years after surgery. A mean score difference of 10 or more between groups was considered clinically relevant and tested further for statistical significance. Results: Of 358 patients, 117 (32·7 per cent) survived for at least 3 years. Of these, 87 patients (74·4 per cent) responded to the questionnaires. Six months after surgery, most aspects of HRQL were substantially worse than in the reference population with no improvement at 3 years. Patients alive at 3 years reported significantly poorer role and social function, and significantly more problems with fatigue, diarrhoea, appetite loss, nausea and vomiting, than in the reference population. Conclusion: HRQL in long-term survivors after oesophagectomy does not improve between 6 months and 3 years after surgery, and is worse than that in a comparable reference population. Copyright © 2008 British Journal of Surgery Society Ltd. Published by John Wiley & Sons, Ltd. [source] A view from the bridge: agreement between the SF-6D utility algorithm and the Health Utilities IndexHEALTH ECONOMICS, Issue 11 2003Bernie J. O'Brien Abstract Background: The SF-6D is a new health state classification and utility scoring system based on 6 dimensions (,6D') of the Short Form 36, and permits a "bridging" transformation between SF-36 responses and utilities. The Health Utilities Index, mark 3 (HUI3) is a valid and reliable multi-attribute health utility scale that is widely used. We assessed within-subject agreement between SF-6D utilities and those from HUI3. Methods: Patients at increased risk of sudden cardiac death and participating in a randomized trial of implantable defibrillator therapy completed both instruments at baseline. Score distributions were inspected by scatterplot and histogram and mean score differences compared by paired t -test. Pearson correlation was computed between instrument scores and also between dimension scores within instruments. Between-instrument agreement was by intra-class correlation coefficient (ICC). Results: SF-6D and HUI3 forms were available from 246 patients. Mean scores for HUI3 and SF-6D were 0.61 (95% CI 0.60,0.63) and 0.58 (95% CI 0.54,0.62) respectively; a difference of 0.03 (p<0.03). Score intervals for HUI3 and SF-6D were (-0.21 to 1.0) and (0.30,0.95). Correlation between the instrument scores was 0.58 (95% CI 0.48,0.68) and agreement by ICC was 0.42 (95% CI 0.31,0.52). Correlations between dimensions of SF-6D were higher than for HUI3. Conclusions: Our study casts doubt on the whether utilities and QALYs estimated via SF-6D are comparable with those from HUI3. Utility differences may be due to differences in underlying concepts of health being measured, or different measurement approaches, or both. No gold standard exists for utility measurement and the SF-6D is a valuable addition that permits SF-36 data to be transformed into utilities to estimate QALYs. The challenge is developing a better understanding as to why these classification-based utility instruments differ so markedly in their distributions and point estimates of derived utilities. Copyright © 2003 John Wiley & Sons, Ltd. [source] Estimating WISC-IV indexes: proration versus linear scalingJOURNAL OF CLINICAL PSYCHOLOGY, Issue 10 2008Laura A. Glass Abstract This investigation compared proration and linear scaling for estimating Wechsler Intelligence Scale for Children,Fourth Edition (WISC-IV) verbal comprehension (VCI) and perceptual reasoning (PRI) composites from all relevant two subtest combinations. Using 57 primary school students and 41 clinical referrals, actual VCI and PRI scores were highly correlated with estimated index scores based on proration and linear scaling (all rs,.90). In the school sample, significant mean score differences between the actual and estimated composites were found in two comparisons; however, differences between mean scores were less than three points. No significant differences emerged in the clinical sample. Results indicate that any of the two subtest combinations produced reasonably accurate estimates of actual indexes. There was no advantage of one computational method over the other. © 2008 Wiley Periodicals, Inc. J Clin Psychol 64:1,6, 2008. [source] An examination of the CTONI utilizing Gc-Gf theory: A comparison of the CTONI and WJ-IIIPSYCHOLOGY IN THE SCHOOLS, Issue 6 2007Kerry S. Lassiter The present investigation examined the validity of the Comprehensive Test of Nonverbal Intelligence (CTONI) with the Woodcock-Johnson III Tests of Cognitive Abilities (WJ-III COG) by administering these instruments in counterbalanced order to 60 college students. Results indicated that the mean CTONI NIQ score was not significantly different from the mean WJ-III COG General Intellectual Ability (GIA) score. However, mean score differences were found between the CTONI NIQ and the WJ-III COG Verbal Ability, Thinking Ability, Comprehension-Knowledge, and Fluid Reasoning cluster scores. Although the correlations between the CTONI and the WJ-III COG cluster scores were generally of small magnitude, the CTONI Geometric Nonverbal IQ composite score demonstrated construct specificity, whereas the CTONI Pictorial Nonverbal IQ scale did not. The implications of the findings are discussed and practitioners are asked to use caution when using this instrument to assess the fluid reasoning abilities of college students. © 2007 Wiley Periodicals, Inc. [source] | ||||||||||