Table 1

Characteristics of the lung and prostate cancer case-control study participants

VariableLung cancerProstate cancer
Case (%)Control (%)Case (%)Control (%)
Sex
 Male174 (63)174 (63)205 (100)205 (100)
 Female102 (37)102 (37)
Race
 White256 (93)257 (93)183 (89)189 (92)
 Black11 (4)10 (4)16 (8)9 (4)
 Other/unknown9 (3)9 (3)6 (3)7 (4)
Exposure population
 Asbestos60 (22)60 (22)69 (34)69 (34)
 Heavy smoker216 (78)216 (78)136 (66)136 (66)
Intervention arm
 Combination161 (58)140 (51)99 (48)94 (46)
 Placebo115 (42)136 (49)106 (52)111 (54)
Age group
 45–492 (1)2 (1)1 (<1)1 (<1)
 50–5448 (17)48 (17)18 (9)18 (9)
 55–5962 (22)62 (22)38 (19)38 (19)
 60–6493 (34)93 (34)72 (35)72 (35)
 65–6970 (25)70 (25)69 (34)69 (34)
 70–741 (<1)1 (<1)7 (3)7 (3)
Body mass indexa
 Normal170 (62)146 (53)100 (49)84 (42)
 Overweight63 (23)87 (32)59 (29)73 (36)
 Obese42 (15)42 (15)46 (22)45 (22)
Alcohol useb
 Nondrinker112 (40)94 (37)52 (27)78 (42)
 ≤1 drink/day88 (34)95 (37)75 (39)60 (32)
 >1 drink/day68 (26)68 (26)64 (34)48 (26)
Study center
 Baltimore24 (9)24 (9)21 (10)21 (10)
 Irvine43 (16)43 (16)23 (11)23 (11)
 New Haven9 (3)9 (3)10 (5)10 (5)
 Portland83 (30)83 (30)67 (33)67 (33)
 San Francisco10 (4)10 (4)8 (4)8 (4)
 Seattle107 (39)107 (39)76 (37)76 (37)
Baseline smoking status
 Current192 (70)192 (70)115 (56)115 (56)
 Former84 (30)84 (30)89 (43)89 (43)
 Never1 (<1)1 (<1)
Pack-yearsc
 <4051 (18)101 (37)69 (34)69 (34)
 40–59116 (42)109 (39)71 (35)74 (36)
 >59109 (40)66 (24)64 (31)61 (30)
Years quit smoking (former smokers)
 <15 (6)6 (7)5 (6)4 (4)
 120 (24)5 (6)9 (10)7 (8)
 213 (15)9 (11)8 (9)8 (9)
 37 (8)16 (19)14 (16)8 (9)
 410 (12)10 (12)3 (3)12 (13)
 510 (12)11 (13)13 (15)9 (10)
 66 (7)6 (7)8 (9)10 (11)
 7+13 (15)21 (25)29 (33)31 (35)
Take supplemental vitaminsd
 Yes104 (39)108 (41)72 (38)66 (35)
 No160 (61)156 (59)115 (62)123 (65)
  • a Participants were grouped as normal (<27.8), overweight (27.8–31.1), and obese (>31.1). Two lung cancer and 3 prostate cancer participants are missing BMI data.

  • b Thirty-seven lung cancer and 38 prostate cancer participants are missing alcohol use data.

  • c Two prostate cancer participants missing pack-year data.

  • d Twenty-four lung cancer participants and 34 prostate cancer participants are missing supplemental vitamin data.