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.

本部份將會探究彝童的體格發展。

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.

多層次模型的縱向分析顯示，在第一至第七輪測試期間，彝童的身高體高指數有明顯的改善，他們的身高體重指標在每一輪測試平均增加0.83個單位（b=0.83，t=3.85）。

迴歸分析的結果指出，在第一輪測試中，不同程度的彝族民族和文化意識、與家人的關係質素（例如：收養者、健在或已過身的父親、健在或已過身的母親及兄弟姊妹）、雙親狀況和兄弟姊妹數目，對彝童的身高體重指標並不會產生顯著的影響。

人口統計上，男性和女性的身高體重指數相差不大，但若細察圖表，會發現女性學生在項目開始前的身高體重指標普遍較低，而在過程中卻逐漸超越了男生，故在這方面需要進行更深入的研究。

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.

平均而言，入學年紀較大的學生的身高體重指數有較顯著的增加，其身高體重指數的平均增長率約為每年0.86單位。中國的研究文獻指出兒童的身高體重指數會隨年紀而上升，因此本研究的結果和文獻吻合。