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. Author manuscript; available in PMC: 2021 Nov 1.
Published in final edited form as: Sleep Med. 2020 Jun 27;75:181–187. doi: 10.1016/j.sleep.2020.06.029

Figure 2.

Figure 2.

Associations of weather and air pollution with continuous measures of sleep among participants with migraine in the Greater Boston area, Massachusetts, 2016–2017. Models were adjusted for day of week, a restricted cubic spline term of day of year, and a participant identifier. Models for air pollution were additionally adjusted for temperature and relative humidity. Results were scaled to 10°F for temperature, 26.5% for relative humidity, 0.28 inHg for barometric pressure, 3.6 μg/m3 for fine particulate matter (PM2.5), 11.7 ppb for nitrogen dioxide (NO2), 0.55 ppb for sulfur dioxide (SO2), 14 ppb for ozone O3, and 150 ppb for carbon monoxide (CO). Error bars indicate the 95% confidence intervals.