Table 1

Characteristics of women receiving iron or placebo for unexplained fatigue in the absence of anaemia. Values are means (standard deviations)

Iron group (n=71)Placebo group (n=65)
Age (years)36.1 (9.9)34.6 (11.5)
Serum ferritin concentration (μg/l)30.4 (31)29.2 (28)
Haemoglobin concentration (g/l)135.4 (9.5)136.5 (10.4)
Fatigue scale (1-10 points) *6.4 (1.6)6.5 (1.5)
Multi-item fatigue questionnaire 18.9 (8.9)20.7 (8.1)
Depressive mood 8.7 (7.5)8.2 (6.5)
Anxiety †7.8 (6.8)7.5 (6.5)
  • * Visual analogue scale.

  • † Score of 0 to 40 points.