Lower serum 25-hydroxyvitamin D3 concentration is associated with higher pain and disability in subjects with low back pain: a case-control study.

Objectives: Low back pain (LBP) is a common medical problem worldwide. The aim of this study is to evaluate the association between serum concentration of 25-hydroxivitamin D3 and functional disability in patients suffering from LBP in a sample of Azeri middle-aged subjects, North West of Iran.

Results: In this case-control study, 63 eligible patients with LBP and 55 healthy subjects enrolled in the study.

Effect of Melatonin on Blood Loss After Cesarean Section: A Prospective Randomized Double-Blind Trial.

Background And Objectives: The similarities between the melatonin and oxytocin signaling could lead to increased contractility of myometrium. We designed this randomized double-blind, placebo-controlled trial to evaluate the efficacy of melatonin in reduction of blood loss during and after the lower segment cesarean section.

Methods: One hundred and twenty patients who had been scheduled for cesarean section under spinal anesthesia were enrolled in the study.

Evaluation of the Analgesic Efficacy of Melatonin in Patients Undergoing Cesarean Section Under S pinal Anesthesia: A Prospective Randomized Double-blind Study.

Melatonin has been suggested as a new natural pain killer in inflammatory pain and during surgical procedures. We designed this randomized double-blind controlled study to evaluate the analgesic efficacy and also optimal preemptive dose of melatonin in patients undergoing cesarean section under spinal anesthesia . One hundred twenty patients scheduled for cesarean section under spinal anesthesia were randomly allocated to one of three groups of 40 each to receive melatonin 3 milligram (mg) (group M), melatonin 6 mg (group M) or placebo (group P) sublingually 20 min before the spinal anesthesia.

Comparison of postoperative analgesic effect of intrathecal clonidine and fentanyl added to bupivacaine in patients undergoing cesarean section: a prospective randomized double-blind study.

Objectives. To compare the analgesic efficacy of intrathecal clonidine and fentanyl added to bupivacaine after cesarean section. Methods.