Percentages of 14-year-old adolescents participating in the Youth Health Monitor meeting the advice for positive screen-time behaviour (<2 h/d), stratified by ethnicity (+-+-+, Dutch; □-□-□, Turkish; ▲-▲-▲, Moroccan; ×-×-×, Surinamese), for school year 2006–2007 until school year 2012–2013, Amsterdam, the Netherlands. Odds ratios and 95 % confidence intervals adjusted for sex, age, district of Amsterdam and educational level, for school year 2012–2013 v. 2006–2007: Dutch (OR=1·00; 95 % CI 0·98, 1·03), Turkish (OR=1·11; 95 % CI 1·07, 1·16), Moroccan (OR=1·05; 95 % CI 1·02, 1·08), Surinamese (OR=1·10; 95 % CI 1·05, 1·14)