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Intermittent missingness occurs if there is a missing observation in between observed assessments.
The differences in collected sample size of 1200 students and the regression sample size 1046 emanates from missing observation on certain variables in the model.
Moreover, the signal Y2 presents an extra class which may correspond to clouds in a SPOT image or even missing observation at some signal sites.
†one missing observation (in group 'explicit request for euthanasia').
Since the 'not applicable' response is coded together with missing observations, any missing observation was also substituted by a mean of the remaining responses in the respective variable.
Data based on 159 entries, after exclusion of 18 entries with missing observation data.
A preliminary analysis examined group differences in weather conditions, missing observation data, and school enrolment size.
Our study demonstrates the use of multiple imputation to derive a single value – the missing observation for a specific respondent.
§Excludes all men with at least one missing observation; 5396 observations remained, representing 1918 participants and 1174 deaths; observation time was 52 593 person years.
*** In total 101 missing observations due to a missing value for one or more independent variables.
*Level of university education: 10 missing observations in Germany and 6 missing observations in Austria.
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