Table 2.
Results of the principal component factor analysis of the CHQ scale
| Items | Factor 1 Restriction of ADL |
Factor 2 Impact on mood and interpersonal relationships |
Factor 3 Pain and anxiety |
Factor 4 Lack of vitality |
|---|---|---|---|---|
| Avoided leaving the house | 0.76 | |||
| Avoided making plans due to unpredictability of CH e.g., holidays | 0.72 | |||
| Felt unable to complete duties at work | 0.66 | |||
| Had difficulty in getting involved in leisure activities e.g., cinema, theatre, etc.? | 0.63 | |||
| Avoided crowded and noisy places e.g., public transport, pubs, etc. | 0.57 | |||
| Felt that the severity of cluster headache affected your daily activities | 0.56 | |||
| Been less involved in family affairs e.g., interaction with children, planning holidays | 0.54 | |||
| Been unable to socialise/spend time with friends and family | 0.46 | |||
| Been unable to achieve your daily goals and carry out routines and chores | 0.42 | |||
| Felt less respected by others | 0.89 | |||
| Had problems with close personal relationship | 0.73 | |||
| Felt you were a burden on family and friends | 0.71 | |||
| Felt self-conscious and uncomfortable about your appearance after a cluster headache attack (e.g., swelling/redness of eyes and facial sweating, etc.) | 0.68 | |||
| Felt that others are dismissive of your cluster headaches | 0.61 | |||
| Felt aggressive | 0.53 | |||
| Felt bad about yourself, lost self-confidence or felt worthless | 0.53 | |||
| Felt like harming yourself or suicidal | 0.53 | |||
| Been irritable, impatient or less tolerant | 0.53 | |||
| Been forgetful e.g., missed appointments | 0.49 | |||
| Been unable to take care of your appearance (e.g., take a bath, put make-up on, change clothes etc.) | 0.49 | |||
| Felt isolated, lonely or vulnerable | 0.45 | |||
| Found your pain is unbearable if untreated | 0.67 | |||
| Dreaded that the headache would not go away | 0.48 | |||
| Felt lacking in energy and constantly tired | −0.88 | |||
| Felt sleepy, worn out or less able to concentrate due to nocturnal attacks of CH | −0.72 | |||
| Had problems concentrating e.g., reading paper, watching TV, etc. | −0.62 | |||
| Been unable to think clearly | −0.60 | |||
| Felt tense or anxious | −0.48 | |||
| % of variance explained | 43.11 | 5.59 | 4.06 | 3.38 |
CHQ cluster headache specific quality of life, ADL activities of daily living