Rate of maturation: population differences in skeletal, dental and pubertal development

Eveleth, Phyllis B.; Tanner, J. M.

doi:10.1017/cbo9780511629105.009

Cited by 5 publications

(9 citation statements)

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“…Development of secondary sexual characteristics is one of the most remarkable morphological changes in adolescence, with significant consequences at the physical and psychological levels. Indeed, the chronology, intensity, and duration of puberty are specific to each adolescent and may vary considerably (Eveleth and Tanner, 1990;Malina et al, 2004a). Puberty timing can be affected by different biological and nonbiological factors.…”

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confidence: 99%

Longitudinal estimates of puberty timing in Senegalese adolescent girls

2005

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This study aimed to assess the timing of sexual maturation (breast development and menarche occurrence) among sub-Saharan African adolescent girls from rural areas. In the framework of a longitudinal study of growth at puberty, the stages of pubertal development (Tanner classification) and menarche occurrence were recorded at intervals between 1995 and 2000 in a sample of 406 Senegalese adolescent girls from a rural area. Nutritional status was estimated during infancy, childhood, and adolescence within this sample, and body composition was estimated only during adolescence. At the beginning of the study (1995), the adolescent girls were 11.4 years old (SD = 0.6). At the end of the study, they were 16.5 years old (SD = 0.6). Median and quartile ages at entry into each maturity stage and its confidence limits were estimated by a lognormal parametric survival model. These adolescent girls were shorter and thinner than girls of the same age from developed countries. Median age at the onset of breast development was 12.6 years (95% CI = 12.5-12.8). Median age at the end of sexual maturation and median age at menarche were estimated respectively at 15.8 years (95% CI = 15.7-15.9) and 15.9 years (95% CI = 15.7-15.9). These adolescent girls were less mature than other adolescent girls of the same age from other developing countries. Their puberty was extremely delayed compared to that of adolescent girls of the same age from industrialized countries. Puberty in these Senegalese adolescent girls is delayed by about 3 years. This may be due to malnutrition, significant energy expenditure, and poor diet and living conditions, and possibly to genetic control.

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Longitudinal estimates of puberty timing in Senegalese adolescent girls

2005

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“…2 For instance, in Holland and Finland, the mean age at puberty dropped from 16.7 year old in 1860 to approximately 13.6 year old in 1980. In Great Britain, children matured 6 months earlier in 1970 compared to the children in 1950.…”

Section: Factors Related To the Onset Of Pubertymentioning

confidence: 99%

“…In Great Britain, children matured 6 months earlier in 1970 compared to the children in 1950. 2 The reason for this decreasing pathway can be understood by the nature of puberty itself. Puberty is defined as: ".…”

Section: Factors Related To the Onset Of Pubertymentioning

confidence: 99%

“…3 Thus, onset of puberty is not spontaneous but proceeds in five stages marked by the development of secondary sexual characteristics, and peaking by first menses. 2,[4][5][6][7] Therefore, its onset and course are very sensitive to many different variables. Indeed, even if puberty is genetically programmed, and all healthy humans will undergo this period of development, its timing is influenced by a variety of environmental factors and individual characteristics.…”

Section: Factors Related To the Onset Of Pubertymentioning

confidence: 99%

“…2 These variations have led researchers to consider two aspects of pubertal development when studying its impact on child psychosocial adjustment, which are: pubertal status and pubertal timing. "The former refers to an absolute, the actual pubertal state at any given point in time.…”

Section: Negative Impact Of Early Pubertal Maturationmentioning

confidence: 99%

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Precocious Puberty in Adolescent Girls: A Biomarker of Later Psychosocial Adjustment Problems

Tremblay

Frigon

2005

Child Psychiatry Hum Dev

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We have investigated the hypothesis that stress condition will accelerate pubertal maturation in adolescent girls and that faster maturing girls will display more behavioral problems than their on-time or late-maturing peers during pubertal development. Longitudinal data were collected yearly from 1986 to 1997. Parents of 1039 French-speaking Canadian girls completed a questionnaire about their characteristics as well as those of their family. To predict onset of puberty by time and cumulative risk factors, a Hierarchical Regression Analysis and a Survival Regression Analysis were conducted. Results revealed that: (1) anxiety at 8 years old, lower level of anxiety a year earlier and more adverse family condition predict a younger age at first menses; and (2) Body Mass Index, conflicts, and sleep disturbances significantly predict the onset of puberty. Complementary standard regression analyses demonstrated that situational stress mediated the effect of these variables. We concluded that precocious puberty could be an indicator of stress in a child, thus, allowing professionals to intervene early and to prevent later problems in psychosocial adjustment.

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Stature and skeletal maturation of two cohorts of Australian children and young adults over the past two decades

Ranjitkar,

Lin,

Macdonald

et al. 2006

Australasian Orthodontic Journal

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BackgroundAssessment of growth and maturation in humans has implications in the diagnosis and treatment of growth disorders and in determining timing of orthopaedic interventions.AimsOur aims were to investigate whether there was evidence of recent secular changes in stature and skeletal maturation in Australians, and to report any association between these parameters.MethodsThe cross-sectional study sample comprised 5,122 South Australian children and young adults, including 2,601 males and 2,521 females aged between 9 and 18 years. Records obtained from 1987 to 2005 included chronological age, stature and skeletal age in these individuals. Centiles for stature were calculated using the National Health and Medical Research Council of Australia (NHMRC) growth references published in 1975. Stature was measured to the nearest 0.1 cm and the developmental stages of strategic ossification centres on hand-wrist radiographs were evaluated using the Greulich and Pyle (1959) atlas method.ResultsAverage values for stature were consistently greater in the 1995–2005 cohort compared with the 1987–94 cohort for both sexes, although secular increases in females were less prominent compared with males. Males in the 1995–2005 cohort were also skeletally advanced when compared with their counterparts in the 1987–94 cohort, but this trend was not evident in females. There were significant associations between stature and skeletal maturation, with the strongest associations being noted around puberty in both sexes and progressively weaker associations in older age groups.ConclusionOur findings indicate secular increases in stature in Australian children and young adults of both sexes over the past few decades, and acceleration of skeletal maturation in males.

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Rate of maturation: population differences in skeletal, dental and pubertal development

Cited by 5 publications

References 0 publications

Longitudinal estimates of puberty timing in Senegalese adolescent girls

Longitudinal estimates of puberty timing in Senegalese adolescent girls

Precocious Puberty in Adolescent Girls: A Biomarker of Later Psychosocial Adjustment Problems

Stature and skeletal maturation of two cohorts of Australian children and young adults over the past two decades

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