Table 2.
Consistency between recalled headache intensity and momentary headache intensity for the two subgroups of patients with tension-type headache
| low SD group | high SD group | |||
| Mean (SD) | ICC (A, 1) (95% C.I.) | Mean (SD) | ICC (A, 1) (95% C.I.) | |
| Recalled headache intensity and | 54.7 (22.5) | 59.5 (17.8) | ||
| mean headache intensity of all recordings | 41.3 (23.2)* | 0.75 (0.04, 0.93) | 33.5 (16.8)* | 0.21 (-0.11, 0.56) |
| mean headache intensity of scheduled recordings only | 41.1 (22.4)* | 0.75 (0.00, 0.93) | 29.2 (16.2)* | 0.16 (-0.09, 0.48) |
| mean headache intensity of event-contingent recordings only | 60.3 (23.0) | 0.81 (0.41, 0.95) | 66.8 (12.2) | 0.21 (-0.22, 0.60) |
| mean headache intensity of recordings when headaches were present | 44.7 (19.0)* | 0.77 (0.24, 0.92) | 40.5 (13.0)* | 0.29 (-0.11, 0.65) |
| maximal headache intensity of all recordings | 71.5 (19.0)* | 0.64 (-0.08, 0.89) | 83.0 (11.7)* | 0.23 (-0.10, 0.59) |
ICC (A, 1), intraclass correlation coefficient of absolute agreement; SD, standard deviation; C.I., confidence interval.
* P < 0.001, vs. recalled headache intensity.
Recalled headache intensity was compared with some indices of momentary headache intensity.
High SD group is a group of patients whose headache intensity was highly variable.