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

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]