Results of splitting the data set

Full data set
Obs    ID           Dob    Gender    PCS    MCS

 1     A32    18FEB1955      M        55     53
 2     A98    28NOV1967      F        63     56
 3     C01    01MAY1970      M        47     39
 4     D11    25DEC1930      F        39     32
Females: Demographics
Obs    ID           Dob    Gender

 1     A98    28NOV1967      F
 2     D11    25DEC1930      F
Males: Demographics
Obs    ID           Dob    Gender

 1     A32    18FEB1955      M
 2     C01    01MAY1970      M
Females: Health Status
Obs    ID     PCS    MCS

 1     A98     63     56
 2     D11     39     32
Males: Health Status
Obs    ID     PCS    MCS

 1     A32     55     53
 2     C01     47     39