Growth Charts

Question 1

1. use of growth chart
2. height vs. weight
3. percentile
4. abnormal growth

Answer 1

1. track status of growth over years
2. rarely height is matched for weight, height is more stable than weight
3. child’s height/weight exceeds the number of percentile number of children their age
4. data points outside of normal range beyond 97th percentile or below 3rd percentile expressed as 97th percentile + X cm/kg or 3rd percentile - X cm/kg

Question 2

predicting adult height
1. channeling
2. mid-parental height
3. calculating BMI

Answer 2

1. use most recent data pt and follow percentile to 20 yrs to predict final stature to accuracy of ± 5 cm without using parental height
2. assume height is completely dependent on genetics to predict final stature to ± 3 cm accuracy, for female (father’s height -13 cm + mother’s height)/2, for male (father’s height + 13 cm + mother’s height)/2
3. weight (kg)/height^2 (cm^2) * 10 000