Browsing by Author "Lindeman, Cliff"
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- ItemOpen AccessCorrection: Development and validation of a case definition for problematic menopause in primary care electronic medical records(2023-10-19) Pham, Anh N.; Cummings, Michael; Yuksel, Nese; Sydora, Beate; Williamson, Tyler; Garies, Stephanie; Pilling, Russell; Lindeman, Cliff; Ross, Sue
- ItemOpen AccessDevelopment and validation of a case definition for problematic menopause in primary care electronic medical records(2023-10-05) Pham, Anh N.; Cummings, Michael; Yuksel, Nese; Sydora, Beate; Williamson, Tyler; Garies, Stephanie; Pilling, Russell; Lindeman, Cliff; Ross, SueAbstract Background Menopause is a normal transition in a woman’s life. For some women, it is a stage without significant difficulties; for others, menopause symptoms can severely affect their quality of life. This study developed and validated a case definition for problematic menopause using Canadian primary care electronic medical records, which is an essential step in examining the condition and improving quality of care. Methods We used data from the Canadian Primary Care Sentinel Surveillance Network including billing and diagnostic codes, diagnostic free-text, problem list entries, medications, and referrals. These data formed the basis of an expert-reviewed reference standard data set and contained the features that were used to train a machine learning model based on classification and regression trees. An ad hoc feature importance measure coupled with recursive feature elimination and clustering were applied to reduce our initial 86,000 element feature set to a few tens of the most relevant features in the data, while class balancing was accomplished with random under- and over-sampling. The final case definition was generated from the tree-based machine learning model output combined with a feature importance algorithm. Two independent samples were used: one for training / testing the machine learning algorithm and the other for case definition validation. Results We randomly selected 2,776 women aged 45–60 for this analysis and created a case definition, consisting of two occurrences within 24 months of International Classification of Diseases, Ninth Revision, Clinical Modification code 627 (or any sub-codes) OR one occurrence of Anatomical Therapeutic Chemical classification code G03CA (or any sub-codes) within the patient chart, that was highly effective at detecting problematic menopause cases. This definition produced a sensitivity of 81.5% (95% CI: 76.3-85.9%), specificity of 93.5% (91.9-94.8%), positive predictive value of 73.8% (68.3-78.6%), and negative predictive value of 95.7% (94.4-96.8%). Conclusion Our case definition for problematic menopause demonstrated high validity metrics and so is expected to be useful for epidemiological study and surveillance. This case definition will enable future studies exploring the management of menopause in primary care settings.
- ItemOpen AccessPrevalence of polypharmacy and associated adverse health outcomes in adult patients with chronic kidney disease: protocol for a systematic review and meta-analysis(2021-07-04) Okpechi, Ikechi G.; Tinwala, Mohammed M.; Muneer, Shezel; Zaidi, Deenaz; Ye, Feng; Hamonic, Laura N.; Khan, Maryam; Sultana, Naima; Brimble, Scott; Grill, Allan; Klarenbach, Scott; Lindeman, Cliff; Molnar, Amber; Nitsch, Dorothea; Ronksley, Paul; Shojai, Soroush; Soos, Boglarka; Tangri, Navdeep; Thompson, Stephanie; Tuot, Delphine; Drummond, Neil; Mangin, Dee; Bello, Aminu K.Abstract Background Polypharmacy, often defined as the concomitant use of ≥ 5 medications, has been identified as a significant global public health threat. Aging and multimorbidity are key drivers of polypharmacy and have been linked to a broad range of adverse health outcomes and mortality. Patients with chronic kidney disease (CKD) are particularly at high risk of polypharmacy and use of potentially inappropriate medications given the numerous risk factors and complications associated with CKD. The aim of this systematic review will be to assess the prevalence of polypharmacy among adult patients with CKD, and the potential association between polypharmacy and adverse health outcomes within this population. Methods/design We will search empirical databases such as MEDLINE, Embase, Cochrane Library, CINAHL, Web of Science, and PsycINFO and grey literature from inception onwards (with no language restrictions) for observational studies (e.g., cross-sectional or cohort studies) reporting the prevalence of polypharmacy in adult patients with CKD (all stages including dialysis). Two reviewers will independently screen all citations, full-text articles, and extract data. Potential conflicts will be resolved through discussion. The study methodological quality will be appraised using an appropriate tool. The primary outcome will be the prevalence of polypharmacy. Secondary outcomes will include any adverse health outcomes (e.g., worsening kidney function) in association with polypharmacy. If appropriate, we will conduct random effects meta-analysis of observational data to summarize the pooled prevalence of polypharmacy and the associations between polypharmacy and adverse outcomes. Statistical heterogeneity will be estimated using Cochran’s Q and I2 index. Additional analyses will be conducted to explore the potential sources of heterogeneity (e.g., sex, kidney replacement therapy, multimorbidity). Discussion Given that polypharmacy is a major and a growing public health issue, our findings will highlight the prevalence of polypharmacy, hazards associated with it, and medication thresholds associated with adverse outcomes in patients with CKD. Our study will also draw attention to the prognostic importance of improving medication practices as a key priority area to help minimize the use of inappropriate medications in patients with CKD. Systematic review registration PROSPERO registration number: [ CRD42020206514 ].
- ItemOpen AccessStudy protocol for Attachment & Child Health (ATTACHTM) program: promoting vulnerable Children’s health at scale(2022-08-19) Anis, Lubna; Letourneau, Nicole; Ross, Kharah M.; Hart, Martha; Graham, Ian; Lalonde, Simone; Varro, Suzanna; Baldwin, Alanna; Soulsby, Angela; Majnemer, Annette; Donnelly, Carlene; Piotrowski, Caroline; Collier, Carrie; Lindeman, Cliff; Goldowitz, Dan; Isaac, Dawn; Thomson, Denise; Serré, Diane; Citro, Elisabeth; Zimmermann, Gabrielle; Pliszka, Harold; Mann, Jackie; Baumann, Janine; Piekarski, Joanna; Dalton, Jo-Anne; Johnson-Green, Joy; Wood, Karen; Bruce, Marcia; Santana, Maria; Mayer, Matt; Gould, Meghan; Kobor, Michael; Flowers, Michelle; Haywood, Michelle; Koerner, Michelle; Parker, Nancy; Muhajarine, Nazeem; Fairie, Paul; Chrishti, Rabea; Perry, Robert; Merrill, Sarah; Pociuk, Shellie; StephanieTaylor; Cole, Steve; Murphy, Tim; Marchment, Tmira; Xavier, Virginia; Shajani, Zahra; West, ZoeAbstract Background Children’s exposure to toxic stress (e.g., parental depression, violence, poverty) predicts developmental and physical health problems resulting in health care system burden. Supporting parents to develop parenting skills can buffer the effects of toxic stress, leading to healthier outcomes for those children. Parenting interventions that focus on promoting parental reflective function (RF), i.e., parents’ capacity for insight into their child’s and their own thoughts, feelings, and mental states, may understand help reduce societal health inequities stemming from childhood stress exposures. The Attachment and Child Health (ATTACHTM) program has been implemented and tested in seven rapid-cycling pilot studies (n = 64) and found to significantly improve parents’ RF in the domains of attachment, parenting quality, immune function, and children’s cognitive and motor development. The purpose of the study is to conduct an effectiveness-implementation hybrid (EIH) Type II study of ATTACHTM to assess its impacts in naturalistic, real-world settings delivered by community agencies rather than researchers under more controlled conditions. Methods The study is comprised of a quantitative pre/post-test quasi-experimental evaluation of the ATTACHTM program, and a qualitative examination of implementation feasibility using thematic analysis via Normalization Process Theory (NPT). We will work with 100 families and their children (birth to 36-months-old). Study outcomes include: the Parent Child Interaction Teaching Scale to assess parent-child interaction; the Parental Reflective Function and Reflective Function Questionnaires to assess RF; and the Ages and Stages Questionnaire – 3rd edition to examine child development, all administered pre-, post-, and 3-month-delayed post-assessment. Blood samples will be collected pre- and post- assessment to assess immune biomarkers. Further, we will conduct one-on-one interviews with study participants, health and social service providers, and administrators (total n = 60) from each collaborating agency, using NPT to explore perceptions and experiences of intervention uptake, the fidelity assessment tool and e-learning training as well as the benefits, barriers, and challenges to ATTACHTM implementation. Discussion The proposed study will assess effectiveness and implementation to help understand the delivery of ATTACHTM in community agencies. Trial registration Name of registry: https://clinicaltrials.gov/. Registration number: NCT04853888 . Date of registration: April 22, 2021.