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Table 5 Multivariable logistic regression for association between individual demographic characteristics and breast cancer stage at diagnosis (stage 0 & I, stage II, III & IV), stratified by area-based SES*

From: Breast cancer stage at diagnosis and area-based socioeconomic status: a multicenter 10-year retrospective clinical epidemiological study in China

Variable High SES areas Low SES areas
  OR (95%CI) Wald (P) OR (95%CI) Wald (P)
Age at Diagnosis (Years)     
   ≤ 40 1.00   1.00  
   40-69 0.94 (0.29-3.09) 0.01 (0.92) 1.18 (0.43-3.23) 0.10 (0.75)
   ≥ 70 1.02 (0.70-1.51) 0.02 (0.90) 1.40 (0.85-2.29) 1.75 (0.19)
Body Mass Index (kg/m 2 )     
   ≤ 24.99 1.00   1.00  
   ≥ 25.00 1.37 (0.92-2.06) 2.39 (0.12) 1.09 (0.40-12.97) 0.03 (0.86)
Occupation     
   Homemaker 1.00   1.00  
   Manual worker 0.81 (0.33-2.02) 0.20 (0.65) 0.18 (0.05-0.64) 6.99 (0.01)
   White-collar worker 0.77 (0.33-1.80) 0.37 (0.54) 0.26 (0.08-0.88) 4.66 (0.03)
   Other 1.21 (0.45-3.25) 0.14 (0.70) 0.18 (0.05-0.65) 6.85 (0.01)
Education     
   University and above 1.00   1.00  
   High school 2.89 (1.30-6.44) 6.76 (0.01) 0.42 (0.07-2.36) 0.97 (0.32)
   Middle school 2.77 (132-5.79) 7.27 (0.01) 0.97 (0.42-2.21) 0.01 (0.94)
   Primary school 1.87 (0.99-3.64) 3.43 (0.06) 0.98 (0.47-2.05) 0.01 (0.96)
   None 1.64 (0.87-3.08) 2.34 (0.13) 0.74 (0.40-1.36) 0.93 (0.34)
Marital Status     
   Married 1.00   1.00  
   Single 6.27 (0.81-48.76) 3.08 (0.08) 1.01 (0.11-9.51) 0.001 (0.99)
   Widowed/Divorced 1.18 (0.14-10.06) 0.02 (0.88) 0.49 (0.15-1.62) 1.38 (0.24)
ER/PR status     
   ER+&PR+ 1.00   1.00  
   ER+&PR- 0.97 (0.50-1.90) 0.01 (0.93) 1.10 (0.54-2.23) 0.07 (0.79)
   ER-&PR+ 1.57 (0.83-2.95) 1.96 (0.16) 0.73 (0.36-1.51) 0.70 (0.40)
   ER-&PR- 1.04 (0.69-1.56) 0.04 (0.85) 1.31 (0.81-2.11) 1.19 (0.28)
  1. *: Education information for 50.3% of cases in the highest SES area was unknown, so we did not analyze the effect of individual demographic characteristics in this subgroup
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