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. 2022 Apr 4;93(6):645–650. doi: 10.1136/jnnp-2021-328700

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© Author(s) (or their employer(s)) 2022. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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Flow chart of included and excluded study participants. ^aThe first questionnaire (Q1) in the MoBA study was sent out to participants in pregnancy week 18. ^bThe third questionnaire (Q3) in the MobA study was sent out to participants in pregnancy week 30. ^cLost to follow-up from pregnancy week 18 to pregnancy week 30. A total of 896 women responded to Q3 without responding to Q1, hence the difference of 6737 from Q1 to Q3. ^dA total of 617 of the women who responded to Q3 did not answer the abuse items. ^eThese women were not eligible for the time-to-event analysis since they had 0 observation years. MoBa, The Norwegian mother, father and Child cohort study; MS, multiple sclerosis; Q, Questionnaire.