. Author manuscript; available in PMC: 2011 Jan 3.

Published in final edited form as: Arch Pediatr Adolesc Med. 2007 May;161(5):434–439. doi: 10.1001/archpedi.161.5.434

Table 3.

Logistic Regression Analyses

Predictor	Current Smoking^*		Susceptibility to Smoking^†
	Crude OR (95% CI)	Adjusted OR^‡ (95% CI)	Crude OR (95% CI)	Adjusted OR^‡ (95% CI)
Perceived prevalence of smoking, 1–11^¶	1.08 (1.05, 1.11)^‖	1.05 (1.02, 1.08)^¶	1.04(1.02, 1.06)^‖	1.01 (0.98, 1.04)
Perceived prevalence among successful/elite, 1–4	1.20 (1.12, 1.29)^‖	1.12 (1.02, 1.23)^¶	1.29 (1.21, 1.39)^‖	1.20 (1.11, 1.29)^‖
Parent/peer disapproval, 1–4	0.55 (0.49, 0.61)^‖	0.66 (0.59, 0.75)^‖	0.78 (0.72, 0.85)^‖	0.87 (0.79, 0.96)^¶
Age (in years)	1.33 (1.17, 1.51)^‖	1.21 (1.01, 1.44)^¶	1.00 (0.90, 1.11)	0.93 (0.81, 1.07)
Male (vs. Female)	1.02 (0.76, 1.38)	0.87 (0.57, 1.32)	0.90 (0.70, 1.17)	1.03 (0.74, 1.43)
Race White Black Other	1 (reference) 0.43 (0.15, 1.23) 0.97 (0.44, 2.13)	1 (reference) 0.32 (0.08, 1.31) 1.08 (0.36, 3.24)	1 (reference) 1.11 (0.58, 2.11) 1.41 (0.70, 2.84)	1 (reference) 0.82 (0.36, 1.85) 1.01 (0.40, 2.51)
Parental Education, 1–4	0.73 (0.62, 0.86)^‖	0.85 (0.68, 1.06)	1.02 (0.88, 1.19)	1.13 (0.94, 1.35)
Parental Smoking (yes vs. no)	2.86 (2.11, 3.88)^‖	1.45 (.96, 2.20)	1.36 (1.03, 1.79)^¶	1.02 (0.71, 1.46)
Sibling Smoking (yes vs. no)	3.58 (2.59, 4.95)^‖	1.66 (1.06, 2.58)^¶	1.94 (1.39, 2.72)^‖	1.09 (0.70, 1.71)
Peer Smoking (yes vs. no)	28.8 (13.4, 61.9)^‖	9.98 (4.49, 22.20)^‖	3.88 (2.93, 5.14)^‖	2.93 (2.07, 4.16)^‖

Defined as having smoked at least once in the past 30 days.

^†

These analyses were conducted on only nonsmoking students (N=995).

^‡

Adjusted for all variables in the table.

^¶

Each point on this scale corresponds with a 10-point increment in percentage. For example, 0=0%, 1=10%, 2=20%, etc.

^‖

P<0.001

^¶

P<0.05