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Sample Size in Qualitative Interview Studies: Guided by Information Power.
Malterud K, Siersma VD, Guassora AD. Malterud K, et al. Among authors: siersma vd. Qual Health Res. 2016 Nov;26(13):1753-1760. doi: 10.1177/1049732315617444. Epub 2016 Jul 10. Qual Health Res. 2016. PMID: 26613970
Educational intervention and functional decline among older people: the modifying effects of social capital.
Poulsen T, Siersma VD, Lund R, Christensen U, Vass M, Avlund K. Poulsen T, et al. Among authors: siersma vd. Scand J Public Health. 2014 May;42(3):295-303. doi: 10.1177/1403494813520353. Epub 2014 Feb 6. Scand J Public Health. 2014. PMID: 24504008 Clinical Trial.
Exploring the concurrent validity of the nationwide assessment of permanent nursing home residence in Denmark - A cross-sectional data analysis using two administrative registries.
Bebe A, Nielsen ABS, Willadsen TG, Søndergaard J, Siersma V, Nicolaisdóttir DR, Kragstrup J, Waldorff FB. Bebe A, et al. Among authors: siersma v. BMC Health Serv Res. 2017 Aug 29;17(1):607. doi: 10.1186/s12913-017-2535-2. BMC Health Serv Res. 2017. PMID: 28851353 Free PMC article.
Mortality Following Trajectories of Mobility Limitations: The Modifying Impact of Social Factors.
Jørgensen TSH, Siersma V, Lund R, Nilsson CJ. Jørgensen TSH, et al. Among authors: siersma v. J Aging Health. 2020 Mar;32(3-4):134-142. doi: 10.1177/0898264318809787. Epub 2018 Nov 15. J Aging Health. 2020. PMID: 30442037
The development and validation of a multidimensional sum-scaling questionnaire to measure patient-reported outcomes in acute respiratory tract infections in primary care: the acute respiratory tract infection questionnaire.
Aabenhus R, Thorsen H, Siersma V, Brodersen J. Aabenhus R, et al. Among authors: siersma v. Value Health. 2013 Sep-Oct;16(6):987-92. doi: 10.1016/j.jval.2013.06.011. Epub 2013 Aug 3. Value Health. 2013. PMID: 24041348
Association of maternal self-medication and over-the-counter analgesics for children.
Jensen JF, Gottschau M, Siersma VD, Graungaard AH, Holstein BE, Knudsen LE. Jensen JF, et al. Among authors: siersma vd. Pediatrics. 2014 Feb;133(2):e291-8. doi: 10.1542/peds.2013-1107. Epub 2014 Jan 6. Pediatrics. 2014. PMID: 24394687
Mobility decline in old age: the combined effect of mobility-related fatigue and socioeconomic position.
Nilsson CJ, Siersma V, Mänty M, Avlund K, Vass M, Lund R. Nilsson CJ, et al. Among authors: siersma v. J Epidemiol Community Health. 2014 Jun;68(6):510-5. doi: 10.1136/jech-2013-203060. Epub 2014 Jan 15. J Epidemiol Community Health. 2014. PMID: 24430582
Comparing the effect of non-medical mechanical restraint preventive factors between psychiatric units in Denmark and Norway.
Bak J, Zoffmann V, Sestoft DM, Almvik R, Siersma VD, Brandt-Christensen M. Bak J, et al. Among authors: siersma vd. Nord J Psychiatry. 2015 Aug;69(6):433-43. doi: 10.3109/08039488.2014.996600. Epub 2015 Jan 23. Nord J Psychiatry. 2015. PMID: 25614990
Point of care susceptibility testing in primary care - does it lead to a more appropriate prescription of antibiotics in patients with uncomplicated urinary tract infections? Protocol for a randomized controlled trial.
Holm A, Cordoba G, Sørensen TM, Jessen LR, Siersma V, Bjerrum L. Holm A, et al. Among authors: siersma v. BMC Fam Pract. 2015 Aug 21;16:106. doi: 10.1186/s12875-015-0322-x. BMC Fam Pract. 2015. PMID: 26292908 Free PMC article. Clinical Trial.
Dementia and Traffic Accidents: A Danish Register-Based Cohort Study.
Petersen JD, Siersma V, Nielsen CT, Vass M, Waldorff FB. Petersen JD, et al. Among authors: siersma v. JMIR Res Protoc. 2016 Sep 27;5(3):e191. doi: 10.2196/resprot.6466. JMIR Res Protoc. 2016. PMID: 27678553 Free PMC article.
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