Half of daily AQI values were less than or equal to the median value, and half equaled or exceeded it:Num:Pt:^Patient:Qn
half of daily aqi values were less than or equal to the median value, and half equaled or exceeded it:num:pt:^patient:qn
Half of daily AQI values were less than or equal to the median value, and half equaled or exceeded it:Num:Pt:^Patient:Qn
half of daily aqi values were less than or equal to the median value, and half equaled or exceeded it:num:pt:^patient:qn