Table 2

Unadjusted and Adjusted Odds Ratios (OR) for Current Smoking

Unadjusted OR (95% CI)

p

Adjusted OR (95% CI)

p

College-level policies and programs

Restrict tobacco distribution

1.12 (0.82–1.52)

0.48

1.00 (0.90–1.11)

0.97

Prohibit tobacco sales on campus

0.82 (0.67–1.02)

0.07

0.95 (0.83–1.08)

0.43

Restrict smoking to 20 ft. from entrances

0.83 (0.67–1.03)

0.09

0.91 (0.79–1.04)

0.15

Prohibit smoking in residence halls

1.21 (0.94–1.54)

0.14

1.02 (0.91–1.36)

0.77

Clearly identify non-smoking areas

1.48 (1.21–1.81)

<0.01

1.45 (1.32–1.60)

<0.01

Provide prevention and education

0.95 (0.66–1.39)

0.81

0.77 (0.63–0.93)

<0.01

Provide smoking cessation classes

0.95 (0.66–1.37)

0.80

1.30 (1.17–1.45)

<0.01

Student-level control variables

Age group (referent = 18–19)

20–21

-

0.92 (0.84–1.01)

0.07

≥22

-

0.85 (0.74–0.98)

0.02

Race/Ethnicity (referent = white)

Hispanic

-

0.85 (0.72–1.00)

0.05

Black

-

0.51 (0.37–0.69)

<0.02

Others

-

0.94 (0.87–1.01)

0.11

Gender (referent = male)

Female

-

0.94 (0.90–0.99)

0.02

Roommate smokes (referent = no roommate)

Yes

-

1.42 (1.26–1.59)

<0.01

No

-

0.67 (0.64–0.70)

<0.01

% of friends who smoke (referent = ≤20%)

21–50%

-

2.62 (2.46–2.79)

<0.01

≥50%

-

6.44 (5.45–7.60)

<0.01

College (referent = applied science)

Arts

-

1.02 (0.83–1.27)

0.84

Business

-

0.91 (0.79–1.03)

0.14

Engineering

-

0.80 (0.73–0.89)

<0.01

Human Sciences

-

0.96 (0.82–1.12)

0.62

Mass Communications

-

0.99 (0.85–1.15)

0.88

Others

-

1.18 (1.02–1.37)

0.03

Academic classification (referent = freshman)

Sophomore

-

0.86 (0.74–0.99)

0.04

Junior

-

0.79 (0.67–0.93)

0.01

Senior

-

0.79 (0.72–0.86)

<0.01

Graduate

-

0.59 (0.50–0.69)

<0.01

Fraternity/sorority member (referent = no)

Yes

-

1.09 (0.98–1.22)

0.12

Intercollegiate athlete (referent = no)

Yes

-

0.93 (0.80–1.07)

0.30

Borders et al. BMC Public Health 2005 5:74   doi:10.1186/1471-2458-5-74