Edgerton V R, Gardner G W, Ohira Y, Gunawardena K A, Senewiratne B
Br Med J. 1979 Dec 15;2(6204):1546-9. doi: 10.1136/bmj.2.6204.1546.
The effects of iron-deficiency anaemia on workers productivity were studied in a tea plantation in Sri Lanka. The quantity of tea picked per day was studied before and after iron supplementation or placebo treatment. After one month's treatment significantly more tea was picked when the haemoglobin (Hb) concentration was increased by iron supplementation than when it was not. The degree of improvement was greater in more-anaemic subjects (those with concentrations of 6.0-9.0 g Hb/dl). The level of physical activity of anaemic subjects in their everyday environment was also recorded for four or 24 hours continuously both before and after treatment. After three weeks these levels was significantly greater in the iron-treated than matched placebo-treated subjects. The economic implications of increased work productively with iron treatment are evident, particularly in developing countries. These results also provide strong evidence for the clinical impression that people with iron-deficiency anaemia suffer from tiredness and weakness.
在斯里兰卡的一个茶园中研究了缺铁性贫血对工人生产力的影响。在补充铁剂或安慰剂治疗前后，对每日采摘的茶叶量进行了研究。经过一个月的治疗，与未补充铁剂相比，补充铁剂使血红蛋白（Hb）浓度升高时采摘的茶叶显著更多。贫血程度较重的受试者（血红蛋白浓度为6.0 - 9.0 g/dl者）改善程度更大。在治疗前后，还连续4小时或24小时记录了贫血受试者在日常环境中的身体活动水平。三周后，接受铁剂治疗的受试者的这些活动水平明显高于匹配的接受安慰剂治疗的受试者。铁剂治疗提高工作效率所带来的经济影响是显而易见的，尤其是在发展中国家。这些结果也为临床印象——缺铁性贫血患者会感到疲倦和虚弱——提供了有力证据。
