Physical Health Development體格發展
Here, we look at the physical health development of Yi children.
Body Mass Index [BMI (kg/m²)] is used to represent the physical health development of Yi children over time. Data of Yi children in cohort 1 (obtained from wave 1 to wave 7, i.e., between the year 2007 and 2013) is employed to understand such a change. As illustrated in the graph below, the BMI of Yi children continues to increase over time.
身高體重指數（Body Mass Index）用以顯示彝童隨時間的體格發展，研究主要利用了首組彝童的數據（從第一至第七輪測試期間取得，即二零零七年至二零一三年）以了解其變化。以下的圖表顯示彝童的身高體重指數隨着時間而持續上升。
Improvement in BMI Overtime 身高體重指標隨着時間的改善
Longitudinal analysis using multilevel modelling shows a statistically significant improvement in the BMI of Yi children from wave 1 to 7. We observe an average of 0.83 units of increase in BMI across each time wave (b=0.83, t=3.85).
Findings of the regression analysis suggest that Yi children who have different levels of Yi ethnic and cultural awareness, different levels of relationship quality with their family members (i.e., adopter, father/late father, mother/late mother, and siblings), dissimilar maternal and paternal status, and different number of siblings measured at Wave 1 do not show statistically significance variations in their BMI.
Demographically, the male and female Yi children do not differ in their BMI. However, a closer look at the graphical illustration suggests that while female students show a lower BMI at the start of the program, their BMI surpass that of their male counterparts over time. Additional study is needed to examine the topic.
BMI Increases with Age身高體重指數隨着年紀增長而上升
On average, students who are older at enrollment showed a statistically significant higher BMI over time: We observe an average of 0.86 units higher in participants’ BMI for every 1 year of increase in their age at enrollment. Findings are consistent with existing literature on BMI in China, which increases as children become older.