Fig. 4. Sensory level to pin prick testing and verbal pain rating (0–10) after intrathecal injection of bupivacaine with 2 mg of ketorolac or saline, 5 min before time 0, in patients in the postoperative pain study. Each symbol represents the mean ± SEM of 14–16 subjects. Groups do not differ by two-way repeated measures analysis of variance.