# print(df.head()) # gives first 5 rows of the data set U can also specifies the no. rows like this, 'df.head(3)' => This'll print first 3 rows ...
# CD = 1 if either diabetes (event_dia) or CVD (event_CVD) occurred # 1. Keep records where time_CD is NA or >0 # 2. Keep records where time_CA is NA or >0 # 3. Exclude records where time_CD equals ...
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