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Table 1 CFS diagnostic questionnaire.

From: The presence of overlapping quality of life symptoms in primary antibody deficiency (PAD) and chronic fatigue syndrome (CFS)

Factor

Score

Delayed prolonged post-exertion malaise after increases in physical, mental and emotional activity

3

Non-restorative sleep with frequent difficulty initiating and/or maintaining sleep

2

Impaired concentration that is reduced further by external stimuli

1

Reduced short term memory with word finding difficulty

1

New onset headaches (> 2/month and different in character from previous headaches)

1

Sore throat with cervical tenderness/recurrent flu-like episodes

1

Arthralgia affecting several joints with stiffness > 1 h but no swelling

1

Myalgia affecting multiple groups and exacerbated by mild exertion

1

Postural instability feeling unstable on standing, prolonged standing or sitting

1

Hypersensitivity to sounds and lights (smells and to a lesser degree taste also)

1

  1. Maximum score 13. A score of 8 or more is required for a diagnosis of CFS to be made