Should proper estimation of sample size be required in RCT?

We read with great interest the research work published in Journal of the Neurological Sciences by C. Molnár et al. where the authors concluded that a single preoperative diclofenac administration reduces postcraniotomy headache as well as postoperative analgesic requirements. The benefit of the same persisted for all five post-operative days in their study. The authors evaluated postoperative pain in 54 craniotomy patients using a 10-cm-long visual analogue scores (VAS) preoperatively, on evenin of surgery, on first and fifth postoperative morning.

from Journal of the Neurological Sciences https://ift.tt/33UA81b