Article Text

PDF
Lucina

Statistics from Altmetric.com

The genetic contribution to congenital club foot remains uncertain. The first twin study on club foot, reported in 1939, showed a pairwise concordance rate of 33% for monozygotic twins and 3% for dizygotic, same-sex twins. That study has been criticised because it was not population based. In 2002 (

) a questionnaire was sent to all 46 418 twins born in Denmark between 1931 and 1982. Ninety-four replied “yes” to a question asking whether they had been born with club foot. Pairwise concordance rates were 2/12 (17%) for monozygotic twins and 2/22 (9%) for dizygotic, same-sex twins. For all dizygotic twins the rate was 5%. It is concluded that genetic factors play a part in club foot but non-genetic factors must be more important.

Adolescents around the world are using tobacco and those who are not current users may be susceptible to taking up the habit within a short time. The Global Youth Tobacco Survey (GYTS) was initiated by the WHO and the US Centers for Disease Control and Prevention (CDC). Data have been reported (

) from 395 survey sites in 131 countries plus the Gaza Strip and the West Bank, about tobacco use among schoolchildren aged 13–15 years during the period 1999–2005. In all, 17% of children (20% of boys and 14% of girls) reported current use of tobacco. Around the world more children (11%) used other forms of tobacco (chewing tobacco, snuff, dip, cigars, pipe, bidis, waterpipe, or betel nut with …

View Full Text

Request permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.