Table 2. Change in pain scores on 100mm Visual Analogue Scale (mm) at 30 min, compared with baseline, in participants with confirmed renal colic.

Analysis type	Salbutamol median (IQR)	Placebo median (IQR)	Difference in medians (95% CI)	P value
Intention-to-treat	(n=49)−18 (−25 to −3)	(n=57)−13 (−33 to −1)	−5 (−16 to 6)	0.575
Per-protocol	(n=42)−18 (−27 to −3)	(n=51)−13 (−34 to −1)	−5 (−15 to 5)	0.309
As-treated	(n=48)−18 (−26 to −3)	(n=58)−11.5 (−33 to −1)	−6.5 (−17 to 4)	0.439