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. Author manuscript; available in PMC: 2021 Sep 3.
Published in final edited form as: J Expo Sci Environ Epidemiol. 2021 Mar 3;31(4):683–698. doi: 10.1038/s41370-021-00309-5

Figure 1. Personal exposure to air pollution monitoring plan for GRAPHS.

Figure 1.

Participants (pregnant women) received baseline carbon monoxide (CO) exposure monitoring at the time of enrollment in the study or shortly after (77% the same day; 86% within a week). Three weeks after intervention stove delivery (itself 1–2 weeks after enrollment), all participants received personal CO exposure monitoring and a subset of participants (65%) each received simultaneous personal CO and personal PM2.5 exposure monitoring. Sessions 3 and 4 were personal CO exposure monitoring only, spaced at three-week intervals prior to birth. One month after birth, both the mother and newborn received personal CO exposure monitoring. Three months later, all mothers received personal CO exposure monitoring and a subset (65%, partially overlapping with the first subset) received simultaneous personal CO and personal PM2.5 exposure monitoring. At this time, all newborns received personal CO exposure monitoring. Newborns did not receive personal PM2.5 exposure monitoring due to the size of the monitor. Eight months later, at child age 1 year, the mother and child received personal CO exposure monitoring. Session numbers (1–7) are associated with the relative timing of the planned monitoring sessions (i.e., baseline = 1, three weeks before birth = 4, four months after birth = 6).