Effect of PND on anal and bulbocavernosus (BC) richness on EMG. The box is defined by the sample mean plus or minus one standard error of the sample mean. The probability to obtain a value in the box is 67 %. The whiskers represent the 95% confidence intervals of the population means.
Beco et al. BMC Surgery 2004 4:15 doi:10.1186/1471-2482-4-15