Site Huancayo, 2000 Lima, 2000 Tarapoto, 2000 Trujillo, 2000 Huancayo, 2003 Lima, 2003 Tarapoto, 2003 Trujillo, 2003 Site Huancayo, 2000 Lima, 2000 Tarapoto, 2000 Trujillo, 2000 Huancayo, 2003 Lima, 2003 Tarapoto, 2003 Trujillo, 2003 Ever smoked cigarettes, even one or two puffs 47.1 (40.9-53.5) (n = 963) 54.6 (49.5-59.6) (n = 1,189) 42.5 (35.6-49.8) (n = 750) 46.5 (38.7-54.5) (n = 1,005) 58.6 (52.9-64.1) (n = 966) 59.6 (52.9-66.0) (n = 998) 48.7 (43.5-54.0) (n = 1,082) 44.5 (39.0-50.2) (n = 1,305) Current cigarette smokers 15.6 (12.0-20.0) (n = 943) 18.6 (15.2-22.5) (n = 1,120) 14.3 (11.2-18.1) (n = 712) 16.3 (12.8-20.6) (n = 928) 15.6 (12.9-18.8) (n = 929) 19.2 (15.1-24.0) (n = 972) 15.5 (12.4-19.1) (n = 1,039) 15.3 (11.4-20.2) (n = 1,257) BMC Public Health 2008, 8(Suppl 1):S2 http://www.biomedcentral.com/1471-2458/8/S1/S2 Table 1: Percent of students who had ever smoked cigarettes, ever smoked their first cigarette before age 10, and of students who had never smoked cigarettes that are likely to initiate smoking in the next year (that is, are susceptible), Peru GYTS, 2000 and 2003 Values are mean (95% confidence intervals). Table 2: Percent of students who were current cigarette smokers, current users of tobacco products other than cigarettes, and current smokers who were dependent on tobacco products, Peru GYTS, 2000 and 2003 Values are mean (95% confidence intervals). day the survey was administered and completed the survey. Student response was quite high (86% to 92% in 2000; 89% to 93% in 2003 [14,15]), suggesting bias due to absence or non-response is small. Third, data are based on self reports of students, who may under- or over-report their use of tobacco. The extent of this bias can not be determined in the Peru data; however, responses to tobacco questions on surveys similar to GYTS have shown good test-retest reliability [19]. Results Prevalence Over 40% of students had ever smoked a cigarette for all four sites in both years (Table 1). In 2003, Huancayo and Lima (58.6% and 59.6%, respectively) had significantly higher prevalences of lifetime cigarette smoking than Trujillo. There was no significant change over time for any of the four sites between 2000 and 2003. Of ever smokers, approximately 1 in 10 in each of the four sites had initiated smoking before age 10, with no significant change between 2000 and 2003. A series of questions are used to develop an index of likely initiation of smoking among never smokers (that is, Ever smokers who initiated smoking before age 10 Never smokers susceptible to initiate smoking in the next year 18.1 (13.6-23.6) (n = 429) 13.5 (11.1-16.4) (n = 605) 10.9 (7.6-15.3) (n = 305) 12.3 (9.1-16.4) (n = 429) 11.6 (8.4-15.7) (n = 550) 13.6 (10.2-17.8) (n = 587) 8.3 (5.9-11.6) (n = 505) 13.1 (9.6-17.7) (n = 585) 29.7 (24.8-35.1) (n = 495) 25.4 (20.6-31.0) (n = 545) 19.2 (15.5-23.6) (n = 416) 25.5 (19.7-32.2) (n = 553) 25.8 (22.0-29.9) (n = 384) 30.5 (24.2-37.8) (n = 388) 19.6 (15.6-24.4) (n = 554) 22.7 (20.8-24.7) (n = 697) Currently used other tobacco products 7.6 (5.7-10.2) (n = 997) 6.3 (4.6-8.7) (n = 1,208) 5.6 (3.7-8.2) (n = 757) 5.3 (3.6-7.5) (n = 1,016) 6.3 (4.6-8.7) (n = 993) 7.9 (5.9-10.4) (n = 1,040) 6.4 (5.0-8.0) (n = 1,123) 6.1 (4.5-8.3) (n = 1,340) Current cigarette smokers who felt like having a cigarette first thing in the morning 0.9 (0.1-7.1) (n = 115) 3.4 (1.2-8.9) (n = 146) 0.0 (n = 64) 3.6 (0.7-16.4) (n = 110) 0.8 (0.1-5.9) (n = 115) 2.6 (0.7-9.2) (n = 144) 1.2 (0.2-8.4) (n = 106) 3.9 (1.2-12.1) (n = 165) susceptibility). Among never smokers, in 2003, suscep- tibility ranged from 19.6% (Tarapoto) to 30.5% (Lima) (Table 1). There was no significant change between 2000 and 2003 for any of the sites. In 2003, current cigarette smoking ranged from 15.3% (Trujillo) to 19.2% (Lima) (Table 2). Current use of tobacco products other than cigarettes ranged from 6.1% (Trujillo) to 7.9% (Lima). Use of other tobacco products was significantly less than cigarette smoking in each of the four sites. Less than 5% of current cigarette smokers reported they feel like having a cigarette first thing in the morning (indicative of cigarette dependency) in each of the four sites. There was no significant change over time in prevalence of current cigarette smokers, current users of other tobacco products and the desire to smoke first thing in the morning for any of the four sites between 2000 and 2003, except in Tarapoto, where the prevalence of desiring to smoke first thing in the morning increased. There was no difference between boys and girls in current smoking in any of the cities (Table 3). In all four cities, 15-year-old students were more likely than 13 year olds to be current smokers. Page 4 of 9 (page number not for citation puroposes)