Dietary Selenium in Pregnant Women of Accra, Ghana- FFQ Evaluation

Dataset contains self-reported food intake from a list of 66 food items or prepared dishes. The data records the frequency and portion size of the food they have eaten during the past month. Each frequency response is coded from a scale of 0 (“Never or less than once per month”) to 8 (“2+ per day”). Coded as follows: 0 - “Never or less than once per month” 1 - “1 per month” 2 - “2-3 per month” 3 - “1 per week” 4 - “2 per week” 5 - “3-4 per week” 6 - “5-6 per week” 7 - “1 per day” 8 - “2+ per day” Each serving size response is coded from a scale of 1, the smallest portion, to 3, the largest portion. 4, “None” was added to enable research assistants to mark something down if the previous answer reported “Never or less than once per month”, instead of leaving the quesion blank. Coded as follows: 1 - *smallest portion 2 - *medium portion 3 - *largest portion 4 - “None” Their reports enabled us to estimate the concentrations of maternal selenium intake in ug/day, directly compared to the U.S. Center for Disease Control’s recommended daily amount of 60 ug/day for pregnant women.

数据集包含66种食物或预制菜肴的自我报告摄入量数据，记录了受试者过去一个月内食用这些食物的频率与份量。频率应答采用0（“从不或每月少于一次”）至8（“每天2次及以上”）的编码量表，具体规则如下：0 - “从不或每月少于一次”、1 - “每月1次”、2 - “每月2-3次”、3 - “每周1次”、4 - “每周2次”、5 - “每周3-4次”、6 - “每周5-6次”、7 - “每天1次”、8 - “每天2次及以上”。份量应答采用1（最小份量）至3（最大份量）的编码量表；此外，新增编码4（“无”），供研究助理在受试者此前回答为“从不或每月少于一次”时标记，避免问题留白。份量编码规则如下：1 - *最小份量、2 - *中等份量、3 - *最大份量、4 - “无”。基于这些报告，我们可估算母体硒摄入量（maternal selenium intake）的浓度（单位：微克/天），并直接与美国疾病控制中心（U.S. Center for Disease Control）推荐的孕妇每日60微克摄入量进行对比。