Curve method of predicting adult height: Find the intersection of the current bone age and height at the time of the film, extend the curve near the intersection, and find the corresponding height at the corresponding position at age 18 according to the law of curve change, which is the curve method of predicting lifetime height under normal growth conditions.
According to the age, height below -2SD curve (boys are diagnosed as short stature (dwarfism) when they are within or below the light yellow area of their own height curve). Weight is diagnosed as obesity when it is above the +2SD curve for the corresponding age (boys are within the light yellow area of this weight curve or above the light yellow area.
Note: 1. Since normal human bone age is similar to age, the prediction of height is relatively accurate only if the bone age is similar to age, and there is normal diet, sleep, exercise, and no obvious growth disorders. For people whose bone age is significantly younger than age, the curve method of predicting height is often not low and less reliable. For those whose bone age is significantly older than age, the accuracy is also limited, but slightly better than those whose bone age is less than age.
2. The prediction of adult height is based on the present bone age and height, and the future height is projected according to the normal growth pattern. For those who are currently short, because they have not grown according to the normal growth pattern, it is very unlikely that they will grow according to the normal growth pattern from the time of prediction without treatment, and it is likely that they will continue to deviate from the normal growth curve gradually, which means that the actual adult height is likely to be shorter than the predicted height.