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Table 1 Examples of meaning units, condensed meaning units and codes

From: From good health to illness with post-infectious fatigue syndrome: a qualitative study of adults’ experiences of the illness trajectory

Meaning unit Condensed meaning unit Code
It’s a bit like a prolonged period of lethargy, which one has after flu… it seemingly wasn’t a disease. Condition perceived as a common flu Tiredness
I collapsed very quickly. I think my working hours were reduced to one hour every 14 days. Suddenly becoming severely fatigued Disability onset
[My] reaction to [exertions] is excessive. Exercise provokes symptom flare-up Increased disability after exercise