Table 1 Data from prospective studies of CH pain intensity.

Russell (1981)

24 patients recorded n = 77 attacks

23 episodic, 1 chronic

22 men, 2 women

No attacks were treated

Attacks rated on a 1–5 scale

Extremely severe (5/5): 23 (30%)

Severe (4/5): 17 (22%)

Moderate (3/5): 20 (26%)

Slight (2/5): 5 (7%)

Very slight (1/5): 12 (15%)

Mean: 3.44, SD: 1.39

Torelli & Manzoni (2003)

42 patients recorded one “typical” attack

42 episodic, 0 chronic

No attacks were treated

Attacks rated on a 0–10 scale

9.0–10: 29 (69%)

8.0–8.9: 7 (17%)

7.0–7.9: 3 (7%)

6.0–6.9: 3 (7%)

Mean: 9.17, SD: 1.0

Snoer et al. (2019)

57 patients recorded a total of 500 attacks

24 episodic, 33 chronic

32 men, 25 women

54 (95%) patients used abortive treatments; 423 (85%) attacks were treated with abortives

Attacks rated on a 0–10 scale

Median (IQR), treated attacks (n = 423): 7.3 (5.9–8.7)

Median (IQR), untreated* attacks (n = 77): 7.0 (5.0–8.4)