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Table 2 Demographic data

From: Long-term outcomes of occipital nerve stimulation for chronic migraine: a cohort of 53 patients

Age
 Mean (SD) 47.75 years (±11.48)
 Range 26–70 years
Sex
 Male 16 (30.2 %)
 Female 37 (69.8 %)
Laterality
 Unilateral 33 (62.3 %)
 Bilateral 20 (37.7 %)
Aura 28 (52.9 %)
 Visual 22 (41.5 %)
 Sensory 15 (28.3 %)
 Hemiplegic 6 (11.3 %)
 Speech 5 (9.4 %)
Duration from onset of migraine
 Mean (SD) 31.51 years (±14.52)
 Range 5–58 years
Duration from onset of Chronic Migraine
 Mean (SD) 11.77 years (±10.90)
 Range 3–48 years
Co-existent headache types 18 (33.9 %)
 Chronic cluster headache 10 (18.7 %)
 SUNCT/SUNA 5 (9.4 %)
 Chronic cluster headache + SUNCT/SUNA 2 (3.8 %)
 SUNCT/SUNA + hemicrania continua 1 (1.9 %)
Number of headache types
 1 35 (66.0 %)
 2 15 (28.3 %)
 3 3 (5.7 %)
Monthly days of acute medication
 Mean (SD) 11.77 (±10.34)
 Range 0–30
Medication overuse at implant 20 (37.7 %)
Mean number of preventatives prior to ONS
 Mean (SD) 9.36 (±2.61)
 Range 4–19
Prior response to GON block 12 (22.6 %)
Follow up since ONS implant
 Median 42.00 months
 Mean (SD) 46.79 months (±21.70)
 Range 6–97 months
  1. GON greater occipital nerve, ONS occipital nerve stimulation, SD standard deviation, SUNA short lasting unilateral neuralgiform headache attacks with autonomic features, SUNCT short lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing