Table 1. The general geographic characterization of the present study.

Administrative regions	Number	Ethnicity	Gender (females, %)	Age range (years)	Height range (cm)
Northeast China	747	Han	56.6	15–80	142.0–188.0
Northern China	813	Han	49.9	5–79	105.5–187.0
Central China	411	Han	47.9	14–79	146.0–188.0
East China	1,635	Han	49.8	5–80	103.5–186.0
Southern China	1,393	Han	48.3	4–76	95.0–190.0
Northwest China	1,339	Han	52.4	5–80	105.0–183.0
Southwest China	777	Han	52.4	4–77	101.0–184.0
Total	7,115	Han	50.9	4–80	95.0–190.0