Regional cerebral blood flow as predictor of response to occipital nerve block in cluster headache

Table 2 Behavioural data from Headache Diary (A), as well as from HADS and SF-36 questionnaires [29]

A. HEADACHE DIARY					B. PSYCHOMETRIC DATA
Patients	Weekly CH attacks PRE GONB	Weekly CH attacks POST GONB	Improvement %	Group	Scale	Subscale	Mean N = 16	SD	T-test *responders* vs *non responders*
Patients	Weekly CH attacks PRE GONB	Weekly CH attacks POST GONB	Improvement %	Group	Scale	Subscale	Mean N = 16	SD	t	sig
1	5	5	0	Non responder	HADS	Depression	9.06	5.26	0.416	0.684
2	35	16	54.2	Responder	HADS	Anxiety	8.88	4.455	0.326	0.749
3	10	0	100	Responder	SF-36	PF	82.5	19.235	−0.379	0.711
4	15	0	100	Responder		RP	15.63	23.936	−1.048	0.312
5	16	0	100	Responder		BP	27.13	24.816	−2.04	0.061
6	21	0	100	Responder		GH	76.38	50.599	−1.466	0.165
7	10	0	100	Responder		VT	37.88	18.301	−1.041	0.315
8	14	14	0	Non responder		SF	47.781	30.2264	−1.604	0.131
9	35	7	80	Responder		RE	37.44	41.968	−0.782	0.447
10	70	31	55.7	Responder		MH	57.5	23.905	−1.792	0.095
11	28	28	0	Non responder
12	14	0	100	Responder
13	4	4	0	Non responder
14	38	36	5.2	Non responder
15	4	6	−50	Non responder
16	6	18	−200	Non responder
17	35	31	11.4	Non responder

Results from Headache Diary included 17 patients as one of the patients included in the MRI data analysis failed to provide results. Similarly, two patients failed to provide HADS and SF-36 responses, and therefore 16 patients were included in the independent samples t–test (i.e. eight responders and 8 non-responders). CH=Cluster Headache; GONB = Greater Occipital Nerve Block; HADS = Hospital Anxiety and Depression Scale; SF-36 = MOS 36-Item Short-Form Health Survey. Alpha = 0.05

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