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Table 1 Selected characteristics of study participants by race and case-control status

From: Physical activity and renal cell carcinoma among black and white Americans: a case-control study

  Black White
Variable, N (weighted %) Controls (N = 523) Cases (N = 361) Controls (N = 712) Cases (N = 856)
Study Site     
Chicago 96 (21) 81 (21) 101 (16) 118 (15)
Detroit 427 (79) 280 (79) 611 (84) 738 (85)
Age, years     
20-44 86 (12) 41 (12) 93 (10) 106 (10)
45-54 125 (26) 102 (26) 145 (20) 185 (20)
55-64 145 (30) 117 (30) 205 (29) 255 (26)
65-74 133 (24) 82 (24) 196 (28) 221 (28)
75+ 34 (8) 19 (8) 73 (13) 89 (13)
Sex     
Male 250 (61) 225 (61) 439 (62) 495 (62)
Female 273 (39) 136 (39) 273 (38) 361 (38)
Education     
<12 years 100 (19) 97 (28) 65 (9) 103 (13)
High school graduate 176 (34) 104 (29) 214 (31) 315 (37)
Some college 172 (32) 113 (30) 184 (26) 215 (25)
4+ years college 75 (15) 47 (13) 249 (35) 223 (26)
Body mass index, kg/m2     
<25 150 (28) 68 (19) 216 (29) 172 (19)
25- < 30 199 (40) 126 (36) 294 (42) 310 (37)
30- < 35 95 (19) 88 (24) 126 (18) 210 (25)
35+ 73 (13) 74 (20) 74 (10) 156 (17)
Missing 6 (1) 5 (1) 2 (<1) 8 (1)
Smoking satus     
Never 184 (34) 123 (34) 287 (40) 309 (36)
Occasional 30 (5) 21 (6) 25 (3) 34 (4)
Former 169 (34) 106 (29) 276 (39) 304 (37)
Current 140 (26) 111 (31) 124 (17) 209 (23)
Family history of cancer     
None 288 (54) 183 (51) 278 (38) 334 (38)
Cancer other than kidney 220 (44) 152 (42) 413 (59) 484 (57)
Kidney cancer 9 (1) 19 (5) 15 (2) 33 (4)
Missing 7 (2) 6 (1) 6 (1) 5 (1)
Hypertension     
Yes 246 (48) 256 (71) 262 (38) 445 (54)
No 273 (51) 102 (29) 445 (61) 398 (44)
Missing 4 (1) 3 (<1) 5 (1) 13 (2)