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Table 1 Characteristics of USRCC Cases and Controls

From: A case–control study of occupation/industry and renal cell carcinoma risk

  Weighted distribution
  Cases Controls
Variables N %a,b N %a,b
Total 1,217   1,235  
Race     
Caucasian 856 73.9 712 73.9
African American 361 26.1 523 26.1
Sex     
Males 720 61.8 689 61.4
Females 497 38.2 546 38.6
Age at Reference Date     
<45 147 10.5 179 10.5
45-54 287 21.6 270 21.6
55-64 372 29.4 350 29.4
65-74 303 27.1 329 27.1
75+ 108 11.5 107 11.5
Mean Age 59.9 years 59.9 years
Study Center     
Detroit 1,018 83.3 1,038 82.7
Chicago 199 16.7 197 17.3
Education Level     
<12 years 200 16.7 165 12.0
High School Graduate 419 34.5 390 31.5
Some College 328 26.3 356 27.3
College Graduate 270 22.5 324 29.3
Smoking Status     
Never 432 35.3 471 38.4
Occasional c 55 4.7 55 4.0
Regular Former Smoker 410 34.7 445 38.0
Regular Current Smoker 320 25.3 264 19.7
History of Hypertension     
No 500 40.8 718 59.0
Yes 701 59.2 508 41.0
BMI (kg/m 2 ) d     
<25 240 19.5 366 29.1
25-29.9 436 37.4 493 41.7
30-34.99 298 24.9 221 18.3
35+ 230 18.2 147 10.9
Histologic RCC Subtype     
Clear Cell 709 58.3   
Papillary 169 13.9   
Chromophobe 58 4.8   
other/NOS 281 23.1   
  1. a Due to rounding error, some categories do not sum to 100%. b A sample weighted frequency distribution. c Smoked 100 cigarettes in the lifetime, but never smoked >1 cigarette a day for >6 months. d BMI five years prior to interview. The following data are unknown: BMI (13 cases, 8 controls), history of hypertension (16 cases, 9 controls).