To assess generalizability, we compared the patients who were analyzed to the 223 patients who were not available for analysis, but presumably meeting other criteria (they were excluded due to death, missing address, non-response, or missing data).
With it, youth can map their neighborhoods, identify where governmental and nongovernmental services exist or are missing, address issues of accessibility for young people, and locate public social spaces where the community is coming together.
Limitations of our study include some missing address information, which was corrected in part through multiple imputation.
This left a further 956 scan records (2% of all recorded scans) excluded due to missing address information.
Furthermore, exclusion of cohort members due to missing data on air pollution exposure, due to missing address or address geocode, is a limitation.
This was either due to missing address information, incompatible street number suffices, or to addresses situated outside of the study area of the Generation R Study [ 16].
Firstly, all cases with a missing address at delivery were assumed not to have moved (i.e. assumed to have the same address at delivery as at booking).
Reasons for nonparticipation for the eligible controls included refusal (22percentt); could not be contacted (14percentt); missing address information (6percentt); and parents were divorced or widowed (2percentt).
The reasons for nonparticipation for the eligible cases included refusal (2percentt); could not be contacted (1 percent); missing address information (2percentt); and parents were divorced or widowed (1percentt).
Missing values because of missing address or missing geographical coordinates were substituted by the levels calculated for the preceding address or, when the first address was missing, for the subsequent address, giving a complete series of annual mean NO2 and NOx concentrations since 1971.
