Table 2.

Comparison of NRS scores within the treatment groups from baseline to 6 months.

Visit	Group	Median	Min.	Max.	χ 2	p value
Cold test
Pre	A	8.00	7	9	1.027	0.598
	B	9.00	8	9
	C	8.00	8	9
After 30 min	A	5.00	4	6	31.175	<0.001
	B	3.00	3	4
	C	6.00	5	7
Week 1	A	6.00	5	6	31.865	<0.001
	B	4.00	4	5
	C	6.00	5	7
Month 1	A	6.00	5	7	23.236	<0.001
	B	5.00	5	6
	C	7.00	6	8
Month 3	A	5.00	5	7	25.592	<0.001
	B	5.00	5	6
	C	7.00	6	8
Month 6	A	7.00	6	7	23.443	<0.001
	B	6.00	6	7
	C	8.00	7	8
Manual scratch test
Pre	A	8.00	7	9	0.495	0.781
	B	8.00	7	9
	C	8.00	7	9
After 30 min	A	4.00	3	6	30.171	<0.001
	B	3.00	2	4
	C	6.00	5	7
Week 1	A	5.00	4	6	26.341	<0.001
	B	4.00	3	5
	C	6.00	5	7
Month 1	A	5.00	4	7	20.950	<0.001
	B	5.00	4	6
	C	7.00	6	8
Month 3	A	6.00	5	7	23.075	<0.001
	B	5.00	4	6
	C	7.00	6	9
Month 6	A	6.00	5	7	26.326	<0.001
	B	6.00	5	6
	C	8.00	7	9
Air blast test
Pre	A	8.00	7	9	0.365	0.833
	B	8.00	7	9
	C	8.00	7	8
After 30 min	A	4.00	3	5	25.252	<0.001
	B	3.00	2	4
	C	5.00	5	6
Week 1	A	5.00	3	6	20.240	<0.001
	B	4.00	3	5
	C	6.00	5	7
Month 1	A	6.00	4	7	17.807	<0.001
	B	5.00	5	6
	C	7.00	6	7
Month 3	A	6.00	5	7	23.134	<0.001
	B	6.00	4	7
	C	7.00	7	8
Month 6	A	6.00	5	7	24.565	<0.001
	B	6.00	5	7
	C	8.00	7	9

Abbreviations: χ², chi-square; NRS, numeric rating scale.