Correction to: Calcium and vitamin D supplementation and/or periodontal therapy in the treatment of periodontitis among
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CORRECTION
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Correction to: Calcium and vitamin D supplementation and/or periodontal therapy in the treatment of periodontitis among Brazilian pregnant women: protocol of a feasibility randomised controlled trial (the IMPROVE trial) Paula Guedes Cocate1, Gilberto Kac2, Berit Lilienthal Hieitmann3, Paulo Nadanovsky4, Maria Cláudia da Veiga Soares Carvalho5, Camila Benaim2, Michael Maia Schlüssel6, Maria Beatriz Trindade de Castro2, Nadya Helena Alves-Santos2, Amanda Farnum Baptista2, Michael F. Holick7, Rana R. Mokhtar7, Alessandra Raymundo Bomfim4 and Amanda Rodrigues Amorim Adegboye8* Correction to: Pilot Feasibility Stud 5, 38 (2019) https://doi.org/10.1186/s40814-019-0417-6 Following publication of the original article [1], the authors reported errors that need to be corrected. The errors consist of text omission as followsr The last paragraph under Study design and setting section reads ‘Baseline data is collected up to the second trimester after checking for participants eligibility to the study (including dental screening for periodontitis) and prior to randomisation to intervention arms (T0); with follow up at the third trimester (T1; during the intervention) and 6-8 weeks postpartum (T2; after the intervention).’ Item 4 (Attrition rate) under Outcome Measures section the text reads ‘To evaluate the reliability and completeness of outcome a feasibility threshold of 70-75% for recruitment will be considered as adequate. Furthermore, an adherence rate of 70% and a loss to follow-up The original article can be found online at https://doi.org/10.1186/s40814019-0417-6. * Correspondence: [email protected] 8 School of Human Sciences, Faculty of Education, Health and Human Sciences, University of Greenwich, London, UK Full list of author information is available at the end of the article
between 20-30% will be considered as adequate. Adequate acceptance of the study design and intervention will be based on qualitative data on barriers and facilitators to the intervention and taste test, the number of sachets consumed and feedback from the follow-up phone calls.’ In the Statistical analysis section, an additional paragraph is included. ‘It is important to highlight that the present study is a feasibility trial. Thus, the priority will be performance of descriptive analysis and estimation of sample size for the main study, therefore the statistical analysis related to results from hypothesis should be interpreted with caution [56] and viewed as entirely exploratory’. In the Discussion section, a final paragraph was included. ‘This study has several potential limitations. Since aggressive periodontitis has a relatively low prevalence based on finding from two systematic reviews [68, 69], it is unlikely that women with this condition will be recruited to the study. However, this chance cannot be
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