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Kynþroski íslenskra drengja

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Authors
Árni V. Þórsson
Atli Dagbjartsson
Gestur I. Pálsson
Víkingur H. Arnórsson
Útgáfudagur
2000-10-01

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Önnur málmynd
Puberty in Icelandic boys
Citation
Læknablaðið 2000, 86(10):655-59
Útdráttur
In a crosssectional study, 2751 healthy Icelandic boys aged 6-16 years, were examined for physical signs of puberty. The study was performed in 1983-1987 and was a part of a larger crosssectional growth study of 5526 Icelandic children all of whom were examined by the authors. Testicular volume of 4 ml (T 4) was considered the first sign of puberty in boys. The mean age of Icelandic boys reaching T 4 was 11.89 years (SD 1.08). The mean time interval between T 4 and T 12 was 2.21 years. The first signs of pubic hair growth, Tanner stage 2 (PH 2), were found at 12.74 years (SD 1.37). The mean time interval between PH 2 and PH 5 was 2.43 years. Even though comparison with studies from other countries is difficult because of different methods and different study design, we find that the timing and tempo of puberty in Icelandic boys is similar to what has been reported from other Nordic countries and countries in Western-Europe.
Gerð var þverskurðarrannsókn á ytri kynþroskaeinkennum hjá 2751 heilbrigðum íslenskum dreng á aldrinum 6-16 ára. Rannsóknin var hluti af stærri rannsókn sem fór fram á árabilinu 1983-1987 en þar var meðal annars mæld hæð, bæði sitjandi og standandi, þyngd og húðfita. Alls tóku 5526 börn og unglingar þátt í rannsókninni, og var það meira en 95% af upprunalegum úrtakshópi. Fyrstu einkenni kynþroska drengja eru talin þegar eistu ná 4 ml rúmmáls (T 4). Meðalaldur íslenskra drengja við upphaf kynþroska var 11,89 ár, staðalfrávik (standard deviation) 1,08 ár. Tímalengd sem tekur eistun að vaxa úr 4 ml í 12 ml (T 4 -T 12) var 2,21 ár. Fyrsti vöxtur kynhára (PH 2) fannst að meðaltali við 12,74 ár, staðalfrávik 1,37 ár. Tímalengd milli PH 2 og PH 5, þegar fullum þroska kynhára var náð, var að meðaltali 2,43 ár. Niðurstöður benda til að kynþroski íslenskra pilta fylgi svipuðu ferli og hjá piltum á Norðurlöndum og meginlandi Vestur-Evrópu. Samanburður við erlendar rannsóknir er hins vegar að mörgu leyti erfiður vegna ólíkra rannsóknaraðferða.
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