Table 2.

MIO at pre-radiotherapy, 1 and 5 years post-radiotherapy for patients with and without trismus (mean (95% CI))

	Pre-RT	1 year post-RT			5 years post-RT
	No trismus (n = 211)	Trismus (n = 49)	No trismus (n = 131)	P value	Trismus (n = 36)	No trismus (n = 93)	P value
	Mean (95% CI)	Mean (95% CI)	Mean (95% CI)		Mean (95% CI)	Mean (95% CI)
MIO	51.5 (51–52)	31.3 (30–33)	45.5 (44–47)	< 0.001	30.4 (29–32)	45.5 (44–47)	< 0.001

Abbreviations: MIO maximum interincisal opening, RT radiotherapy, CI confidence interval