DEFINE PERSONA.anest
AS SWITCH
INCASE PERSONA.NIVINS = 0 ASSIGN 0
INCASE PERSONA.NIVINS = 9 ASSIGN 99
INCASE (PERSONA.NIVINS = 4 AND PERSONA.GRADO=0) OR (PERSONA.NIVINS = 4 AND PERSONA.GRADO=1)
ASSIGN 0
INCASE PERSONA.NIVINS = 4
ASSIGN PERSONA.GRADO - 1
INCASE PERSONA.NIVINS = 1 OR PERSONA.NIVINS = 2
ASSIGN PERSONA.GRADO
INCASE PERSONA.NIVINS = 3
ASSIGN PERSONA.GRADO + 6
INCASE PERSONA.NIVINS = 5
ASSIGN PERSONA.GRADO + 9
INCASE PERSONA.NIVINS = 6 OR PERSONA.NIVINS = 7
ASSIGN PERSONA.GRADO + 12
INCASE PERSONA.NIVINS = 8
ASSIGN PERSONA.GRADO + 18
ELSE 99
filter edad > 4 
VARLABEL "Años de estudio"
VALUELABELS
99 "No informado"
TYPE INTEGER
RANGE 0 : 99


TABLE EC01C5A3
AS AVERAGE
OF anest
by ciudadres
by ciudadres5
filter anest <99 and edad>34 and edad <50