Síntoma o malestar (tos, dolor de cabeza, fiebre, nauseas)
2
Enfermedad (gripe, colítis,etc)?
3
Recaída de enfermedad crónica?
4
Accidente?
5
Ninguno
9
Omisión
Sysmiss
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.