Table 2.

Results of the Koenker’s studentised test, n=31

Pairwise test of trials	Preintervention trials		Postintervention trials
	Χ2	P value	Χ2	P value
1–2	1.33	0.25	0.41	0.52
2–3	0.05	0.83	1.38	0.24
1–3	0.28	0.60	0.20	0.66