Change in level of fatigue after one month in women receiving iron or placebo for unexplained fatigue in absence of anaemia. Values are means (standard deviations) unless stated otherwise

Level of fatigue *
Type of therapy
No of women
Baseline
One month
Decrease
Difference (95% CI)
P value
Iron
71
6.4 (1.6)
4.5 (1.9)
1.82 (1.7)
0.97 (0.32 to 1.62)
0.004
Placebo
65
6.5 (1.5)
5.6 (2.2)
0.85 (2.1)

* Measured on visual analogue scale.

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