Correction to: BMC Public Health21 (Suppl 2), 408 (2021). https://doi.org/10.1186/s12889-021-10448-x and BMC Public Health21 (Suppl 2), 2336 (2021).https://doi.org/10.1186/s12889-022-13725-5

Following publication of the original articles, the authors brought the following, concerning their use of the ‘MMSE’ instrument to the attention of the journal: We used an unauthorized version of the Portuguese MMSE without permission from PAR. PAR have now granted retrospective permission. The MMSE is a copyrighted instrument and may not be used or reproduced in whole or in part, in any form or language, or by any means without written permission of PAR (www.parinc.com).