Initial data analysis for longitudinal studies to build a solid foundation for reproducible analysis. by Lara Lusa, Cécile Proust-Lima, Carsten O Schmidt, Katherine J Lee, Saskia le Cessie, Mark Baillie, Frank Lawrence, Marianne Huebner, TG3 of the STRATOS Initiative

“…We propose a systematic approach in longitudinal studies to examine data properties prior to conducting planned statistical analyses. …”
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Association between polypharmacy and falls in older adults: a longitudinal study from England by Nafeesa N Dhalwani, Melanie J Davies, Kamlesh Khunti, Harini Sathanapally, Radia Fahami, Sam Seidu

“…Objectives Assess the longitudinal association between polypharmacy and falls and examine the differences in this association by different thresholds for polypharmacy definitions in a nationally representative sample of adults aged over 60 years from England.Design Longitudinal cohort study.Setting The English Longitudinal Study of Ageing waves 6 and 7.Participants 5213 adults aged 60 or older.Main outcome measures Rates, incidence rate ratio (IRR) and 95% CI for falls in people with and without polypharmacy.Results A total of 5213 participants contributed 10 502 person-years of follow-up, with a median follow-up of 2.02 years (IQR 1.9–2.1 years). …”
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Risk of childlessness in help-seeking men with Peyronie's disease-A Swedish longitudinal study. by Ralf Kuja-Halkola, Lars Henningsohn, Brendan Zietsch, Henrik Larsson, Martin Cederlöf

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Impact of fitness coach behavior on exercise motivation, commitment, and enjoyment: A longitudinal study by Ricardo Braga-Pereira, Guilherme Eustáquio Furtado, Francisco Campos, António Rodrigues Sampaio, Pedro Teques

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The optic radiations and reading development: A longitudinal study of children born term and preterm by Lisa Bruckert, Garikoitz Lerma-Usabiaga, Lauren R. Borchers, Virginia A. Marchman, Katherine E. Travis, Heidi M. Feldman

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Impact of fitness coach behavior on exercise motivation, commitment, and enjoyment: A longitudinal study. by Ricardo Braga-Pereira, Guilherme Eustáquio Furtado, Francisco Campos, António Rodrigues Sampaio, Pedro Teques

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Age-related changes in DNA methylation in a sample of elderly Brazilians by Hayley Welsh, Caio M. P. F. Batalha, Weili Li, Nadja C. Souza-Pinto, Yeda A. O. Duarte, Michel S. Naslavsky, Esteban J. Parra

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The Impact of Cross-National Distance on Survival of Foreign Subsidiaries by Fabio Cassio-de-Souza, Mario Henrique Ogasavara

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Relation between occupation, gender dominance in the occupation and workplace and suicide in Sweden: a longitudinal study by Gun Johansson, Theo Bodin, Anette Linnersjö, Vladimir Carli, Gergö Hadlaczky, Nuria Matilla Santander, Bianca Blazevska

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Predictors of Respiratory Symptoms in a Rural Canadian Population: A Longitudinal Study of Respiratory Health by Chandima P Karunanayake, Donna C Rennie, Punam Pahwa, Yue Chen, James A Dosman

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Serum Ferritin Levels in Pregnancy and Their Association with Gestational Diabetes Mellitus: A Prospective Longitudinal Study by Qin Z, Du Y, Wang Z, Qin X, Wu H, Yu X, Zhao C, Mo L, Huang B

“…However, the changes in SF levels during pregnancy and their relationship with gestational diabetes mellitus (GDM) and blood glucose levels are not well understood.Methods: This prospective longitudinal study included 390 participants (130 GDM cases and 260 controls) during early pregnancy. …”
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Determinants of tobacco use transitions in smoker nursing students in Catalonia: A prospective longitudinal study by Kenza Laroussy, Esteve Fernández, Yolanda Castellano, Marcela Fu, Antoni Baena, Ariadna Feliu, Armando Peruga, Mercè Margalef, Olena Tigova, Jordi Galimany, Montserrat Puig, Carmen Moreno, Albert Bueno, Antonio López, Judith Roca, Judith Saura, Cristina Martínez

Subjects: “…longitudinal study…”
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Lower limb coordination patterns following anterior cruciate ligament reconstruction: A longitudinal study by Cortney Armitano-Lago, Elizabeth Bjornsen, Caroline Lisee, Ashley Buck, Christin Büttner, Adam W. Kiefer, Todd A. Schwartz, Brian Pietrosimone

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Predictors of sickness absence among employees with common mental disorders in Sweden– a longitudinal study by Anna Frantz, Anna Toropova, Iben Axén, Gunnar Bergström, Anna Finnes, Elisabeth Björk Brämberg

“…Abstract Background The study aimed to explore which sociodemographic, health-related, and work-related factors were associated with the number of sickness absence days during 18 months among employees on sickness absence due to common mental disorders. Methods A longitudinal study with participants from a cluster-randomized controlled trial was conducted. …”
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Population pharmacokinetics of ramipril in patients with chronic heart failure: A real-world longitudinal study by Trobec Katja Čvan, Grabnar Iztok, Trontelj Jurij, Lainščak Mitja, Kos Mojca Kerec

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Kynurenines and aerobic exercise capacity in chronic kidney disease: A cross-sectional and longitudinal study. by Helena Wallin, Eva Jansson, Sophie Erhardt, Carin Wallquist, Britta Hylander, Stefan H Jacobson, Kenneth Caidahl, Anette Rickenlund, Maria J Eriksson

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Impact of handgrip strength on cardiovascular, cancer and all-cause mortality in the Korean longitudinal study of ageing by Gyu Ri Kim, Jiyu Sun, Minkyung Han, Sohee Park, Chung Mo Nam

“…Objective To examine whether reduced handgrip strength, as a marker of muscle weakness, is linked with the risk of cardiovascular, cancer and all-cause mortality among older adults.Design We used data from the 2006 to 2014 Korean longitudinal study of ageing study. Estimates of handgrip strength were collected using a handheld dynamometer. …”
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Joint effect of modifiable risk factors on Parkinson’s disease: a large-scale longitudinal study by Panlong Li, Xirui Zhu, Min Liu, Yanfeng Wang, Chun Huang, Junwei Sun, Shan Tian, Yuna Li, Yuan Qiao, Junting Yang, Shanshan Cao, Chaohua Cong, Lei Zhao, Jingjing Su, Dandan Tian

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The Relationship Between Mental Health Literacy and Social Well-Being: A Longitudinal Study in China by Jiali Pan, Tianyu Xu, Dan Li

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Development of a psychological frailty index: results from the China health and retirement longitudinal study by Jinlong Zhao, Justina Yat Wa Liu, Justina Yat Wa Liu, Daniel Fernández, Stefanos Tyrovolas, Stefanos Tyrovolas, Stefanos Tyrovolas, Stefanos Tyrovolas

“…Therefore, this study aimed to develop and initially validate a Psychological Frailty Index (PFI) based on the China Health and Retirement Longitudinal Study (CHARLS). The study assessed the applicability of the PFI to adverse health outcomes as a secondary aim.ResultsFactor analysis of the 15-item PFI extracted four factors of psychological frailty (psychological distress, cognitive decline, physical vulnerability, and memory decline). …”
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