缺铁孩子数学差
路透社纽约健康消息 美研究人员发现，缺铁会影响孩子理解数学问题的能力，这一项研究结果有助于解释为什么上了高中以后男孩子在数学方面比女孩子出色， 因为女孩子比男孩子容易缺铁。
对近5,400名年龄在6-16岁的孩子研究发现，在标准化数学考试中，缺铁的孩子与营养充足的孩子相比，他们低于平均分的成绩是后者的两倍多。发表在《儿科学》杂志上的一份研究认为，女孩们由于极易缺铁，因此，也特别易受到铁对学习能力的影响。
铁是红细胞生成所必须的原料，缺铁会导致贫血，或者红细胞很少。作者提到，学习能力与缺铁的大多数研究集中于那些患缺铁性贫血的人群，而不是那些缺铁但未患贫血症的更广泛的人群。该研究结果提示医生们应该筛选发现可能缺铁的孩子。
纽约罗彻斯特大学医学和牙科学院的吉尔· S ·哈尔特曼博士认为，如果这些研究结果被证实，那么进行缺铁症筛选，特别是对那些还没有患上贫血的孩子们来说，可以会保护这一处于高风险的人群。预防性补铁或者治疗已受到影响的孩子，有可能防止缺铁造成的潜在的负性认知作用。但现在还不清楚是否能通过补铁来改善学习问题。
, http://www.100md.com
哈尔特曼和同事们指出，快速生长期营养的需要、经期血液的丢失和营养不良的饮食使得少女们易缺铁。缺铁会导致脑内铁贮备减少，从而可能影响到与学习有关的酶和神经递质。尽管婴儿缺铁与学习障碍之间的关系是众所周知的，缺铁对较大的孩子是否有同样的作用尚不清楚。
根据该研究，总的来说有3%的孩子缺铁，即全美国有120万学龄儿童缺铁，将近9%的少女缺铁。缺铁，甚至还没引起贫血症时，就可能导致考试成绩下降。例如，缺铁但未贫血的孩子数学的平均成绩是87.4，缺铁且贫血的孩子是86.4，而铁贮备足的孩子则是93.7。但是阅读测试的成绩则没有显著差别。哈尔特曼说，目前还不清楚为什么缺铁仅影响数学成绩，而且铁对大脑的作用也了解得不够。
富含铁的食物包括肝、牡蛎、豆腐和豆类如小扁豆、菜豆和鹰嘴豆。
来源：《儿科》2001;107
Lack of Iron Can Cause Learning Problems in Kids
, 百拇医药
NEW YORK (Reuters Health) - In a study that may help to explain why boys tend to outsmart their female counterparts in math class by the time they reach high school, US researchers have found that iron deficiency may affect children‘s ability to understand math problems.
The study of nearly 5,400 children aged 6 to 16 years found that those who were deficient in iron were more than twice as likely to score below average on standardized math tests than their more well-nourished peers. Girls, who are at greatest risk for iron deficiency, were particularly vulnerable to the mineral‘s effect on learning, according to the report in the June issue of Pediatrics.
, http://www.100md.com
Iron is essential to the production of red blood cells, and deficiency in the mineral can lead to anemia, or having too few red blood cells. Most studies of learning and iron deficiency have focused on people with iron-deficiency anemia, and not the larger group of individuals who are
iron-deficient but do not have anemia, the authors note.
The findings suggest that doctors should screen certain patients for iron deficiency, the researchers conclude.
, 百拇医药
``If these findings are confirmed, then screening for iron deficiency, particularly for those children without anemia, might be warranted for high-risk children,‘‘ Dr. Jill S. Halterman of the University of Rochester School of Medicine and Dentistry in Rochester, New York, told Reuters Health. ``It is possible that preventive iron supplementation, or treatment of those children who are affected, would prevent the potentially negative cognitive effects of iron deficiency.‘‘
, http://www.100md.com
However, it is not yet clear whether learning problems can be corrected through iron supplementation, she added.
Halterman and colleagues explain that nutrition needs during a period of rapid growth, loss of blood due to menstrual periods and poor diets make adolescent girls susceptible to iron deficiency. Iron deficiency results in decreased iron stores in the brain, where it may affect enzymes and neurotransmitters that impact learning.
, http://www.100md.com
While the relationship between iron deficiency and learning problems in infants is well known, it is unclear whether the deficiency has the same effect on older children.
According to the study, 3% of children overall were iron-deficient, which translates into 1.2 million school-aged children nationwide. Nearly 9% of adolescent girls were found to be deficient in iron. Iron deficiency, even when it did not cause anemia, was associated with lower scores on tests.
, 百拇医药
For instance, the average math test score for children who were iron-deficient but not anemic was 87.4, compared with a score of 86.4 for children who were both iron-deficient and anemic and 93.7 for those who had adequate iron stores.
There were no significant differences in scores on reading tests, however. Halterman said it is not clear why iron deficiency affected only math test scores, adding that the effects of iron on the brain are not well understood.
Foods rich in iron include liver, oysters, tofu and legumes such as lentils, kidney beans and chickpeas.
SOURCE: Pediatrics 2001;107., 百拇医药
对近5,400名年龄在6-16岁的孩子研究发现，在标准化数学考试中，缺铁的孩子与营养充足的孩子相比，他们低于平均分的成绩是后者的两倍多。发表在《儿科学》杂志上的一份研究认为，女孩们由于极易缺铁，因此，也特别易受到铁对学习能力的影响。
铁是红细胞生成所必须的原料，缺铁会导致贫血，或者红细胞很少。作者提到，学习能力与缺铁的大多数研究集中于那些患缺铁性贫血的人群，而不是那些缺铁但未患贫血症的更广泛的人群。该研究结果提示医生们应该筛选发现可能缺铁的孩子。
纽约罗彻斯特大学医学和牙科学院的吉尔· S ·哈尔特曼博士认为，如果这些研究结果被证实，那么进行缺铁症筛选，特别是对那些还没有患上贫血的孩子们来说，可以会保护这一处于高风险的人群。预防性补铁或者治疗已受到影响的孩子，有可能防止缺铁造成的潜在的负性认知作用。但现在还不清楚是否能通过补铁来改善学习问题。
, http://www.100md.com
哈尔特曼和同事们指出，快速生长期营养的需要、经期血液的丢失和营养不良的饮食使得少女们易缺铁。缺铁会导致脑内铁贮备减少，从而可能影响到与学习有关的酶和神经递质。尽管婴儿缺铁与学习障碍之间的关系是众所周知的，缺铁对较大的孩子是否有同样的作用尚不清楚。
根据该研究，总的来说有3%的孩子缺铁，即全美国有120万学龄儿童缺铁，将近9%的少女缺铁。缺铁，甚至还没引起贫血症时，就可能导致考试成绩下降。例如，缺铁但未贫血的孩子数学的平均成绩是87.4，缺铁且贫血的孩子是86.4，而铁贮备足的孩子则是93.7。但是阅读测试的成绩则没有显著差别。哈尔特曼说，目前还不清楚为什么缺铁仅影响数学成绩，而且铁对大脑的作用也了解得不够。
富含铁的食物包括肝、牡蛎、豆腐和豆类如小扁豆、菜豆和鹰嘴豆。
来源：《儿科》2001;107
Lack of Iron Can Cause Learning Problems in Kids
, 百拇医药
NEW YORK (Reuters Health) - In a study that may help to explain why boys tend to outsmart their female counterparts in math class by the time they reach high school, US researchers have found that iron deficiency may affect children‘s ability to understand math problems.
The study of nearly 5,400 children aged 6 to 16 years found that those who were deficient in iron were more than twice as likely to score below average on standardized math tests than their more well-nourished peers. Girls, who are at greatest risk for iron deficiency, were particularly vulnerable to the mineral‘s effect on learning, according to the report in the June issue of Pediatrics.
, http://www.100md.com
Iron is essential to the production of red blood cells, and deficiency in the mineral can lead to anemia, or having too few red blood cells. Most studies of learning and iron deficiency have focused on people with iron-deficiency anemia, and not the larger group of individuals who are
iron-deficient but do not have anemia, the authors note.
The findings suggest that doctors should screen certain patients for iron deficiency, the researchers conclude.
, 百拇医药
``If these findings are confirmed, then screening for iron deficiency, particularly for those children without anemia, might be warranted for high-risk children,‘‘ Dr. Jill S. Halterman of the University of Rochester School of Medicine and Dentistry in Rochester, New York, told Reuters Health. ``It is possible that preventive iron supplementation, or treatment of those children who are affected, would prevent the potentially negative cognitive effects of iron deficiency.‘‘
, http://www.100md.com
However, it is not yet clear whether learning problems can be corrected through iron supplementation, she added.
Halterman and colleagues explain that nutrition needs during a period of rapid growth, loss of blood due to menstrual periods and poor diets make adolescent girls susceptible to iron deficiency. Iron deficiency results in decreased iron stores in the brain, where it may affect enzymes and neurotransmitters that impact learning.
, http://www.100md.com
While the relationship between iron deficiency and learning problems in infants is well known, it is unclear whether the deficiency has the same effect on older children.
According to the study, 3% of children overall were iron-deficient, which translates into 1.2 million school-aged children nationwide. Nearly 9% of adolescent girls were found to be deficient in iron. Iron deficiency, even when it did not cause anemia, was associated with lower scores on tests.
, 百拇医药
For instance, the average math test score for children who were iron-deficient but not anemic was 87.4, compared with a score of 86.4 for children who were both iron-deficient and anemic and 93.7 for those who had adequate iron stores.
There were no significant differences in scores on reading tests, however. Halterman said it is not clear why iron deficiency affected only math test scores, adding that the effects of iron on the brain are not well understood.
Foods rich in iron include liver, oysters, tofu and legumes such as lentils, kidney beans and chickpeas.
SOURCE: Pediatrics 2001;107., 百拇医药