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Table 2 Unadjusted Odds ratios (ORs) and 95% confidence intervals [CI) of factors associated with current smoking among in-school American youth

From: Current cigarette smoking among in-school American youth: results from the 2004 National Youth Tobacco Survey

Characteristic Total OR [95% CI] Male Female
Age (years)    
   Total    
   ≤ 12 1.00 1.00 1.00
   13 2.44 [2.03, 2.94] 2.49 [1.93, 3.21] 2.49 [1.90, 3.27]
   14 3.67 [3.07, 4.39] 3.85 [3.01, 4.93] 3.59 [2.76, 4.67]
   15 4.78 [4.01, 5.71] 4.71 [3.68, 6.01] 5.02 [3.88, 6.49]
   16+ 8.26 [7.06, 9.67] 7.65 [6.15, 9.51] 9.20 [7.30, 11.59]
Ethnicity    
   White 1.00 1.00 1.00
Black or African American 0.48 [0.43, 0.54] 0.42 [0.35, 0.50] 0.55 [0.47, 0.65]
   Asian 0.46 [0.37, 0.57] 0.36 [0.26, 0.50] 0.54 [0.41, 0.72]
   Hispanic 0.83 [0.75, 0.92] 0.70 [0.61, 0.80] 0.99 [0.86, 1.14]
American Indian/Alaska Natives 0.97 [0.82, 1.15] 0.81 [0.63, 1.05] 1.14 [0.91, 1.43]
Native Hawaiian/Other Pacific Islander 0.91 [0.73, 1.15] 0.65 [0.45, 0.95] 1.13 [0.84, 1.52]
Lived with a cigarette smoker    
   No 1.00 1.00 1.00
   Yes 2.83 [2.60, 3.08] 3.06 [2.71, 3.46] 2.63 [2.33, 2.97]
Closest friends smoked cigarettes    
   None 1.00 1.00 1.00
   One 3.63 [3.15, 4.19] 3.15 [2.55, 3.88] 4.36 [3.58, 5.31]
   Two or more 5.03 [4.27, 5.95] 4.76 [3.66, 6.19] 5.69 [4.60, 7.05]
Perception that it is safe to smoke for only a year or two, if quit after that    
   Definitely not 1.00 1.00 1.00
   Probably not 4.65 [4.21, 5.13] 4.97 [4.34, 5.68] 4.40 [3.80, 5.09]
   Probably yes 10.32 [9.01, 11.82] 9.50 [6.42, 12.64] 10.71 [8.85, 12.96]
   Definitely yes 12.63 [10.42, 15.30] 10.47 [8.59, 12.76] 15.49 [12.17, 19.71]
Pocket money ($/week)    
   None 1.00 1.00 1.00
   1–10 1.21 [1.04, 1.41] 1.24 [1.01, 1.53] 1.14 [0.91, 1.44]
   11–20 2.12 [1.82, 2.46] 1.99 [1.62, 2.44] 2.29 [1.83, 2.85]
   21–50 3.15 [2.71, 3.66] 2.92 [2.37, 3.59] 3.47 [2.78, 4.32]
   51–100 3.99 [3.37, 4.71] 4.02 [3.18, 5.06] 4.12 [3.24, 5.25]
   >100 5.56 [4.46, 6.50] 4.91 [3.90, 6.18] 6.40 [5.14, 7.96]
  1. Current smoking defined as having smoked cigarette at least one day in the last 30 days All groups other than "Hispanic" are non Hispanic