8. When the independent heterogeneity results were evaluated, an important statistical difference was apparent for the first 3h in favour of the use of epidural analgesia mean difference at first hour: 1.9 95% CI 1.5 and 2.22 p < 0.00001; 2h: 3.63 95% CI 2.64 and 4.63 p &lt 0.00001; 3h: 2.57 95% CI 1.17 and 2.45 p = 0.0003.
8. Al evaluar el resultado independiente de la heterogeneidad de los estudios, se sugiere una importante diferencia estadística para las 3 primeras horas a favor del uso de analgesia epidural diferencias medias a la hora 1: 1,9 IC 95%: 1,5 a 2,22; p < 0,00001; a la hora 2: 3,63 IC 95%: 2,64 a 4,63; p < 0,00001; a la hora 3: 2,57 IC 95%: 1,17 a 2,45; p = 0,0003.