Table 1.

Demographics

CharacteristicsTotal, n = 577<15 headaches, n = 377CDH, n = 200Frequent headache, n = 74Daily intermittent, n = 87Daily continuous, n = 39
* p < 0.0001 onset vs presentation.
a p < 0.0001 vs total group;
b p < 0.001 vs total group;
c p < 0.01 vs total group;
d p < 0.0001 vs not CDH;
e p < 0.001 vs not CDH;
f p < 0.01 vs not CDH.
CDH = chronic daily headaches.
Age, y, mean ± SD
Onset8.1 ± 3.67.5 ± 3.5c9.3 ± 3.6ad8.8 ± 3.3f9.6 ± 3.8bd9.7 ± 3.6be
Presentation*11.1 ± 3.510.4 ± 3.5b12.5 ± 3.1ad11.9 ± 3.1d12.6 ± 3.0ad13.3 ± 3.1ad
Gender ratio (M:F)1:1.181:0.881:2.131:2.361:1.901:2.25
Race, n (%)
White505 (87.4)329 (87.3)176 (88.0)66 (89.2)74 (85.1)36 (92.3)
Black67 (11.6)45 (11.9)22 (11.0)8 (10.8)12 (13.8)2 (5.1)cf
Asian3 (0.5)1 (0.3)2 (1.0)01 (1.1)1 (2.6)
Other2 (0.3)2 (0.5)0000