Table 4

Number of recovered patients 3 and 15 months after baseline

3 months after baseline15 months after baseline
RecoveredNot recoveredRecoveredNot recovered
Treatment group3211179862538
Control group42016807371263
  • Recovery was defined as a total sum score ≤3 on the Chalder Fatigue Questionnaire (each item scored 0-0-1-1), analogous to the case definition of chronic fatigue used as inclusion criterion in the present study. P values are based on Fisher's exact test or χ2 test, as appropriate.