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  • 1.
    Burström, Lage
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Yrkes- och miljömedicin.
    Jonsson, Håkan
    Umeå universitet, Medicinska fakulteten, Institutionen för strålningsvetenskaper.
    Björ, Bodil
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Yrkes- och miljömedicin.
    Hjalmarsson, Ulla
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Yrkes- och miljömedicin.
    Nilsson, Tohr
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Yrkes- och miljömedicin.
    Reuterwall, Christina
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Yrkes- och miljömedicin.
    Wahlström, Jens
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Yrkes- och miljömedicin.
    Daily text messages used as a method for assessing low back pain among workers2016Ingår i: Journal of Clinical Epidemiology, ISSN 0895-4356, E-ISSN 1878-5921, nr 70, s. 45-51Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    OBJECTIVES: To evaluate a method for collecting data concerning low back pain (LBP) using daily text messages and to characterize the reported LBP in terms of intensity, variability, and episodes.

    STUDY DESIGN AND SETTING: We conducted a cohort study of LBP among workers used by a mining company. The participants were asked to answer the question "How much pain have you had in your lower back in the last 24 hours on a scale from 0 to 10, where 0 = no pain and 10 = the worst pain imaginable" once a day for 5 weeks, with this process being repeated 6 months later.

    RESULTS: A total of 121 workers participated in the first period of data collection, and 108 participated in the second period. The daily response rate was 93% for both periods, and cluster analysis was shown to be a feasible statistical method for clustering LBP into subgroups of low, medium, and high pain. The daily text messages method also worked well for assessing the episodic nature of LBP.

    CONCLUSION: We have demonstrated a method for repeatedly measuring of LBP using daily text messages. The data permitted clustering into subgroups and could be used to define episodes of LBP.

  • 2.
    Hedman, Linnea
    et al.
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Yrkes- och miljömedicin. Sunderby Cent Hosp Norrbotten, Dept Med, Obstruct Lung Dis No Sweden Studies, S-97189 Lulea, Sweden.
    Bjerg, Anders
    Perzanowski, Matthew
    Rönmark, Eva
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin, Yrkes- och miljömedicin. Sunderby Cent Hosp Norrbotten, Dept Med, Obstruct Lung Dis No Sweden Studies, S-97189 Lulea, Sweden.
    Good agreement between parental and self-completed questionnaires about allergic diseases and environmental factors in teenagers2010Ingår i: Journal of Clinical Epidemiology, ISSN 0895-4356, E-ISSN 1878-5921, Vol. 63, nr 7, s. 783-789Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    OBJECTIVES: To study whether the methodological change from parent to index subject as questionnaire respondent affected the prevalence estimates and risk factor patterns for allergic diseases in a longitudinal study.

    STUDY DESIGN AND SETTING: A prospective study of asthma and allergic diseases among children was begun in 1996 within the Obstructive Lung Disease in Northern Sweden Study. In 2002, about 3,342 (95% of invited) teenagers (13 to 14 years) completed the annual questionnaire. A random sample of 294 (84% of invited) parents also completed the same extended International Study of Asthma and Allergies in Childhood questionnaire. Skin prick tests were performed in 1996 and 2000.

    RESULTS: There were no significant differences in the prevalence of rhinitis, eczema, or related environmental factors between parental and self-reports, except for the question of having a dog at home. The absolute agreement was high, whereas the kappa values were fair or moderate. Kappa values of questions regarding parental smoking were 0.8-0.9. Allergic sensitization was the major risk factor for both rhinitis and eczema, and the odds ratios were similar regardless of who reported the condition.

    CONCLUSION: The agreement between the parental and teenagers' reports was good, and the methodological change did not affect the study results.

  • 3.
    Lyrén, Per-Erik
    et al.
    Umeå universitet, Samhällsvetenskapliga fakulteten, Institutionen för tillämpad utbildningsvetenskap, Beteendevetenskapliga mätningar (BVM).
    Atroshi, Isam
    Lunds universitet; Hässleholm och Kristianstad sjukhus.
    Using item response theory improved responsiveness of patient-reported outcomes measures in carpal tunnel syndrome2012Ingår i: Journal of Clinical Epidemiology, ISSN 0895-4356, E-ISSN 1878-5921, Vol. 65, nr 3, s. 325-334Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objective To compare responsiveness based on item response theory (IRT) with that based on conventional scoring for two patient-reported outcomes measures in carpal tunnel syndrome (CTS); the short disabilities of the arm, shoulder, and hand (QuickDASH) measure, and the 6-item CTS symptoms scale (CTS-6).

    Study Design and Setting Prospective cohort study of patients with CTS undergoing carpal tunnel release at one orthopedic department. Of 455 consecutive patients, 343 completed the QuickDASH and the CTS-6 before and within 1 year after surgery. IRT-based and conventional scores were compared in subgroups according to global rating of change in hand status and treatment satisfaction. The effect size (ES) and the area under the receiver operating characteristic (ROC) curve were used as measures of responsiveness.

    Results The mean value for the IRT-based QuickDASH estimate was −0.09 (standard deviation [SD] = 1.13) preoperatively and −2.14 (SD = 1.79) postoperatively (ES = −1.8) and for the CTS-6 estimate was 0.29 (SD = 1.36) preoperatively and −3.87 (SD = 2.3) postoperatively (ES = −3.1), indicating very large improvement. The ES for the QuickDASH and CTS-6 were very large (−2.4 and −3.8), respectively, in the group with the largest perceived improvement and decreased with lower perceived improvement. The ES was consistently larger with IRT-based scoring than conventional scoring. The AUC for the QuickDASH and CTS-6 exceeded 0.85.

    Conclusion IRT-based scoring showed high responsiveness for the QuickDASH and CTS-6, and the ES were larger than those estimated using conventional scoring.

  • 4. Mendis, Shanthi
    et al.
    Lindholm, Lars H.
    Umeå universitet, Medicinska fakulteten, Institutionen för folkhälsa och klinisk medicin.
    Anderson, Simon G.
    Alwan, Ala
    Koju, Rajendra
    Onwubere, Basden J. C.
    Kayani, Azhar Mahmood
    Abeysinghe, Nihal
    Duneas, Alfredo
    Tabagari, Sergo
    Fan, Wu
    Sarraf-Zadegan, Nizal
    Nordet, Porfirio
    Whitworth, Judith
    Heagerty, Anthony
    Total cardiovascular risk approach to improve efficiency of cardiovascular prevention in resource constrain settings2011Ingår i: Journal of Clinical Epidemiology, ISSN 0895-4356, E-ISSN 1878-5921, Vol. 64, nr 12, s. 1451-1462Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Objectives: To determine the population distribution of cardiovascular risk in eight low- and middle-income countries and compare the cost of drug treatment based on cardiovascular risk (cardiovascular risk thresholds >= 30%/>= 40%) with single risk factor cutoff levels.

    Study Design and Setting: Using World Health Organization (WHO) and the International Society of Hypertension risk prediction charts, cardiovascular risk was categorized in a cross-sectional study of 8,625 randomly selected people aged 40-80 years (mean age, 54.6 years) from defined geographic regions of Nigeria, Iran, China, Pakistan, Georgia, Nepal, Cuba, and Sri Lanka. Cost estimates for drug therapy were calculated for three countries.

    Results: A large fraction (90.0-98.9%) of the study population has a 10-year cardiovascular risk <20%. Only 0.2-4.8% are in the high-risk categories (>= 30%). Adopting a total risk approach and WHO guidelines recommendations would restrict unnecessary drug treatment and reduce the drug costs significantly.

    Conclusion: Adopting a total cardiovascular risk approach instead of a single risk factor approach reduces health care expenditure by reducing drug costs. Therefore, limited resources can be more efficiently used to target high-risk people who will benefit the most. This strategy needs to be complemented with population-wide measures to shift the cardiovascular risk distribution of the whole population. (C) 2011 Elsevier Inc. All rights reserved.

  • 5. Mullan, Rebecca J
    et al.
    Flynn, David N
    Carlberg, Bo
    Umeå universitet, Medicinsk fakultet, Folkhälsa och klinisk medicin, Medicin.
    Tleyjeh, Imad M
    Kamath, Celia C
    LaBella, Matthew L
    Erwin, Patricia J
    Guyatt, Gordon H
    Montori, Victor M
    Systematic reviewers commonly contact study authors but do so with limited rigor.2009Ingår i: Journal of Clinical Epidemiology, ISSN 0895-4356, E-ISSN 1878-5921, Vol. 62, nr 2, s. 138-142Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    OBJECTIVES: Author contact can enhance the quality of systematic reviews. We conducted a systematic review of the practice of author contact in recently published systematic reviews to characterize its prevalence, quality, and results. STUDY DESIGN AND SETTING: Eligible studies were systematic reviews of efficacy published in 2005-2006 in the 25 journals with the highest impact factor publishing systematic reviews in clinical medicine and the Cochrane Library, identified by searching MEDLINE, EMBASE, and the Cochrane Library. Two researchers determined whether and why reviewers contacted authors. To assess the accuracy of the abstracted data, we surveyed reviewers by e-mail. RESULTS: Forty-six (50%) of the 93 eligible systematic reviews published in top journals and 46 (85%) of the 54 eligible Cochrane reviews reported contacting authors of eligible studies. Requests were made most commonly for missing information: 40 (76%) clinical medicine reviews and 45 (98%) Cochrane reviews. One hundred and nine of 147 (74%) reviewers responded to the survey, and reported a higher rate of author contact than apparent from the published record. CONCLUSION: Although common, author contact is not a universal feature of systematic reviews published in top journals and the Cochrane Library. The conduct and reporting of author contact purpose, procedures, and results require improvement.

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