The statistical analysis was carried out with the software program SPSS for Windows release 15.0 and the variables with normal distribution were analyzed through paired Student's t test.
El análisis estadístico fue procesado en el programa SPSS 15.0 for Windows y las variables con distribución normal fueron analizadas a través del test t pareado de Student.
A análise estatística foi processada no programa SPSS 15.0 for Windows e as variáveis com distribuição normal foram analisadas através do teste t pareado de Student.