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Table 3 The results obtained from logistic regression analysis for periodontal knowledge improvement

From: Assessment of periodontal knowledge following a mass media oral health promotion campaign: a population-based study

  B OR* (95% CI) P B OR** (95% CI) P
Gender       
Male   1.00 (ref.)    1.00 (ref.)  
Female 0.38 1.47 (1.04-2.08) 0.028 0.46 1.59 (1.05-2.43) 0.029
Age group       
18-24   1.00 (ref.)    1.00 (ref.)  
25-34 0.52 1.68 (1.06-2.65) 0.025 0.56 1.76 (1.00-3.08) 0.047
35-44 0.20 1.22 (0.74- 2.01) 0.424 0.36 1.44 (0.77-2.68) 0.248
> = 45 0.41 1.51 (0.88-2.58) 0.131 0.56 1.76 (0.89-3.47) 0.104
Education       
Illiterate/Elementary   1.00 (ref.)    1.00 (ref.)  
High school 0.22 1.25 (0.75-2.08) 0.388 0.85 2.34 (1.23-4.43) 0.009
University 0.34 1.41 (0.84-2.35) 0.189 1.20 3.33 (1.66-6.64) 0.001
Economic status       
Low   1.00 (ref.)    1.00 (ref.)  
Moderate 0.02 1.02 (0.64-1.62) 0.917 -0.41 0.95 (0.56-1.61) 0.877
High -0.20 0.81 (0.51- 1.29) 0.396 -0.17 0.84 (0.49-1.44) 0.531
Time of watching TV       
Rarely/Never   1.00 (ref.)    1.00 (ref.)  
One hour or less per day 0.33 1.40 (0.90-2.16) 0.130 0.50 1.65 (0.97-2.81) 0.062
Two hours or more per day 0.32 1.38 (0.80-2.35) 0.237 0.32 1.38 (0.73-2.61) 0.313
Seeing the campaign       
No   1.00 (ref.)    1.00 (ref.)  
Yes 0.56 1.75 (1.20-2.56) 0.004 0.79 2.20 (1.37-3.54) 0.001
Knowledge score at baseline -1.20 0.29 (0.22-0.40) <0.001 -1.36 0.25 (0.17-0.36) <0.001
  1. OR = odds ratio; CI = confidence intervals.
  2. *Unadjusted or derived from univariate logistic regression analysis.
  3. **Adjusted for gender, age, education, economic status, time of watching TV, seeing the campaign, and knowledge score at baseline.