DIAB_AGE_ONSET_0
Descriptive statistics
Provides descriptive statistics for a subset or all variables in the study data
Variable data type
Check if the declared data types in the metadata match the observed data types in the study data.
Item missingness
Presence and amount of missing data for each variable, separated by class of missingness (i.e., system missingness (NA), used missing codes and jump codes). The higher the number or percentage of missing values, the lower the data quality.
Note:
1. “ADDED: SysMiss” or “Sysmiss N” refers to NA’s (i.e., system-indicated missing values);
2. The percentage of all the columns in the table (except Measurements N (%)) are calculated over the Observation N. The percentage of Measurement N is calculated by dividing the value (Measurement N) by the difference between the number of observations and the number of jumps (Observation N - Jumps N).
Item Nonresponse-rate
The higher the rate, the lower the data quality. For further information, see here
dataquieR 2.1.0