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Table 1 Baseline variables included demographic characteristics and comorbid medical disorders for two cohorts (n = 25,992)

From: Lovastatin lowers the risk of breast cancer: a population-based study using logistic regression with a random effects model

Baseline variable Breast cancer patients
n = 4332
Control patients
n = 21,660
p value
No % No %
Characteristics      
Age (years)      
 18–30 68 1.6 340 1.6  
 31–40 428 9.9 2140 9.9  
 41–50 1402 32.4 7010 32.4  
 51–60 1306 30.1 6530 30.1  
 61–70 721 16.6 3605 16.6  
 >70 407 9.4 2035 9.4  
Urbanization level      <0.001
 Urban 1 1681 38.8 6857 31.7  
 Urban 2 1273 29.4 6348 29.3  
 Urban 3 566 13.1 3049 14.1  
 Urban 4 455 10.5 2994 13.8  
 Urban 5–7 357 8.2 2412 11.1  
Comorbid medical disorders CCI      
Myocardial infarction      0.206
 Yes 24 0.6 158 0.7  
 No 4308 99.4 21,502 99.3  
Congestive heart failure      0.179
 Yes 269 6.2 1466 6.8  
 No 4063 93.8 20,194 93.2  
Peripheral vascular disease      0.160
 Yes 199 4.6 1108 5.1  
 No 4133 95.4 20,552 94.9  
Cerebrovascular disease      0.191
 Yes 447 10.3 2385 11.0  
 No 3885 89.7 19,275 89.0  
Dementia      0.004
 Yes 87 2.0 601 2.8  
 No 4245 98.0 21,059 97.2  
Chronic pulmonary disease      0.009
 Yes 1217 28.1 5665 26.2  
 No 3115 71.9 15,995 73.8  
Connective tissue disease-rheumatic disease      0.587
 Yes 323 7.5 1564 7.2  
 No 4009 92.5 20,096 92.8  
Peptic ulcer disease      0.057
 Yes 1470 33.9 7028 32.4  
 No 2862 66.1 14,632 67.6  
Mild liver disease      <0.001
 Yes 1240 28.6 4849 22.6  
 No 3092 71.4 16,762 77.4  
Diabetes      0.065
 Yes 945 21.8 4455 20.6  
 No 3387 78.2 17,205 79.4  
Paraplegia/hemiplegia      0.420
 Yes 99 2.3 543 2.5  
 No 4233 97.7 21,117 97.5  
Renal disease      0.188
 Yes 180 4.2 1002 4.6  
 No 4152 95.8 20,658 95.4  
Moderate or severe liver disease      0.781
 Yes 14 0.3 78 0.4  
 No 4318 99.7 21,582 99.6  
Metastatic cancer      <0.001
 Yes 339 7.8 94 0.4  
 No 3993 92.2 21,566 99.6  
AIDS/HIV      1.000
 Yes 0 0.0 2 0.0  
 No 4332 100.0 21,658 100.0  
CCI score (SD) 1.63 (1.58) 1.48 (1.55) <0.001
Medicine use      
Statins      0.045
 Yes 632 14.6 3422 15.8  
 No 3700 85.4 18,238 84.2