@article{fdi:010081560, title = {{T}he unintended consequences of {COVID}-19 mitigation measures matter : practical guidance for investigating them [commentary]}, author = {{T}urcotte-{T}remblay, {A}.{M}. and {G}ali {G}ali, {I}.{A}. and {R}idde, {V}al{\'e}ry}, editor = {}, language = {{ENG}}, abstract = {{B}ackground : {COVID}-19 has led to the adoption of unprecedented mitigation measures which could trigger many unintended consequences. {T}hese unintended consequences can be far-reaching and just as important as the intended ones. {T}he {W}orld {H}ealth {O}rganization identified the assessment of unintended consequences of {COVID}-19 mitigation measures as a top priority. {T}hus far, however, their systematic assessment has been neglected due to the inattention of researchers as well as the lack of training and practical tools. {M}ain text : {O}ver six years our team has gained extensive experience conducting research on the unintended consequences of complex health interventions. {T}hrough a reflexive process, we developed insights that can be useful for researchers in this area. {O}ur analysis is based on key literature and lessons learned reflexively inconducting multi-site and multi-method studies on unintended consequences. {H}ere we present practical guidance for researchers wishing to assess the unintended consequences of {COVID}-19 mitigation measures. {T}o ensure resource allocation, protocols should include research questions regarding unintended consequences at the outset. {S}ocial science theories and frameworks are available to help assess unintended consequences. {T}o determine which changes are unintended, researchers must first understand the intervention theory. {T}o facilitate data collection, researchers can begin by forecasting potential unintended consequences through literature reviews and discussions with stakeholders. {I}ncluding desirable and neutral unintended consequences in the scope of study can help minimize the negative bias reported in the literature. {E}xploratory methods can be powerful tools to capture data on the unintended consequences that were unforeseen by researchers. {W}e recommend researchers{V}cast a wide net by inquiring about different aspects of the mitigation measures. {S}ome unintended consequences{V}may only be observable in subsequent years, so longitudinal approaches may be useful. {A}n equity lens is necessary{V}to assess how mitigation measures may unintentionally increase disparities. {F}inally, stakeholders can help validate{V}the classification of consequences as intended or unintended.{VC}onclusion : {S}tudying the unintended consequences of {COVID}-19 mitigation measures is not only possible but also necessary to assess their overall value. {T}he practical guidance presented will help program planners and evaluators gain a more comprehensive understanding of unintended consequences to refine mitigation measures}, keywords = {{MONDE}}, booktitle = {}, journal = {{BMC} {M}edical {R}esearch {M}ethodology}, volume = {21}, numero = {1}, pages = {28 [17 ]}, ISSN = {1471-2288}, year = {2021}, DOI = {10.1186/s12874-020-01200-x}, URL = {https://www.documentation.ird.fr/hor/fdi:010081560}, }