11 Matching Annotations
  1. Sep 2020
  2. Aug 2020
  3. Jul 2020
  4. Jun 2020
  5. May 2020
  6. Nov 2018
    1. In the academic setting especially, a premium will beplaced on clinical quality improvement, the develop-ment of practice guidelines, and outcomes research,not only to provide the physician with a creative out-let and a potential source of funding during thenonclinical months but also to give the academiccenter a practical research-and-development arm
  7. May 2018
    1. Negative values included when assessing air quality In computing average pollutant concentrations, EPA includes recorded values that are below zero. EPA advised that this is consistent with NEPM AAQ procedures. Logically, however, the lowest possible value for air pollutant concentrations is zero. Either it is present, even if in very small amounts, or it is not. Negative values are an artefact of the measurement and recording process. Leaving negative values in the data introduces a negative bias, which potentially under represents actual concentrations of pollutants. We noted a considerable number of negative values recorded. For example, in 2016, negative values comprised 5.3 per cent of recorded hourly PM2.5 values, and 1.3 per cent of hourly PM10 values. When we excluded negative values from the calculation of one‐day averages, there were five more exceedance days for PM2.5 and one more for PM10 during 2016.