Table 2: Change in level of fatigue after one month in woman 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 N. 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; Table originally published in: Ruiz-Cantero MT, et al. [30].