Absence of heterogeneity at the end of labour was confirmed I2 = 0% and Q − p = 0.44. When the differences in pain intensity were analyzed with both therapies at the time of delivery, no statistically significant differences were found mean difference =-0.04; 95% CI -0.85 and 0.77, p = 0.92 see Fig.
Se confirmó ausencia de heterogeneidad al final del trabajo de parto I=0% y Q-p= 0,44; al analizar las diferencias en la intensidad con ambas terapias en el momento del parto no se hallaron diferencias estadísticamente significativas diferencia media = -0,04; IC 95%: -0,85 a 0,77; p = 0,92 fig.