关键词: 青春期, 性征, 身高, 体重

Abstract: Objective To describe the relationship between physical growth and sex characteristics for males at puberty in order to add to the mounting evidence for the development of growth charts based on puberty phases. Methods Data about physical growth and sexual development of 9 767 school-aged males at age 6~19 years were obtained from part of the Beijing Child and Adolescent Metabolic Syndrome Study conducted in 2004.General characteristics of height and weight gains were compared and analyze based on the different Tanner stages of pubic hair and testicular volume and the different phases of puberty,respectively. Results 1) Height is taller and weight heavier in spermatorrhea adolescents than no-spermatorrhea,showing a narrowing trend in difference of the two groups from the age of 11 to 16 years.2)Comparing with the growth pattern without developmental stages,both height and weight are significantly lower at age 11~13 years in stage of PH1 or TV＜4 mL,following a cross with higher then lower in stages of PH2,PH3 or 4 mL≤TV＜20 mL,and slightly higher in stages of PH4,PH5 or TV≥20 mL.3) The growth patterns of height and weight at different puberty phases are different from those of ignoring puberty phases.Height is shorter and weight lighter for some of normal population at pre-puberty,and taller and heavier trends are observed among another of normal population at in-puberty and completing puberty.4) P₃ and P₉₇ percentiles of height and weight based on different puberty phases do not shift cross corresponding P₁ and P₉₉ percentiles based on ignoring puberty phase,respectively. Conclusions The classification method of pre-puberty,in puberty and completing puberty based on pubic hair and testicular volume is useful to construct the growth references of puberty phases.Shifting up or down a major empirical percentile may be helpful to adjust the effect of sex development on height and weight when using conventional growth chart for age to assess growth level of adolescents.

Key words: puberty, sex characteristics, height, weight