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Table 4 Odd ratios and confidence interval of variables associated with awareness rate in multiple unconditional logistic regression analysis

From: Knowledge and perceptions of air pollution in Ningbo, China

Characteristics β OR OR 95 % CIa P value
Age group
 14-29(reference)   1 0.00-0.00  
 30-39(1) 0.18 1.19 0.88-1.60 0.26
 40-49(2) 0.45 1.58 1.13-2.20 <0.01
 50-59(3) 1.34 3.84 2.79-5.27 <0.01
 60-(4) 1.26 3.54 2.49-5.02 <0.01
Occupation group
 Student(reference)   1 0.00-0.00  
 Cadre and technician(1) 0.48 1.62 1.07-2.45 <0.05
 Service(2) 0.66 1.94 1.24-3.04 <0.01
 Unemployed(3) 1.04 2.84 1.51-5.36 <0.01
 Manual worker(4) 1.26 3.54 2.15-5.83 <0.01
 Homemaker and retired(5) 1.80 6.05 3.94-9.29 <0.01
  1. a CI confidence interval, OR odds ratio. Note: assigned “the score of knowledge ≥ 5” to 1, others to 0; Assigned “age 14-29” to 0 (reference group), “30–39” = 1, “40–49” = 2, “50–59” = 3, “≥60” = 4; Assigned “occupation group Student” to 0(reference group), “Cadre and technician” = 1,“Service” = 2; “Unemployed” = 3, “Manual worker” = 4,“Homemaker and retired” = 5