Table 2.

Mean 24-hour urinary DIM among each of the 25 subjects after consumption of Brussels sprouts or cabbage once daily for 3 consecutive days

Baseline urinary DIM pmol/mg CrMean 24-hour urinary DIM pmol/24 hours ± SDMean 24-hour urinary DIM pmol/mg Cr ± SD
Subject #Feeding orderBCBCBCDifference pmol/mg Cr
1CNDND13,466 ± 4,272973 ± 5049.18 ± 3.170.60 ± 0.378.58
2C0.95ND60,673 ± 40,6752,233 ± 52844.00 ± 31.041.47 ± 0.3342.53
3CND0.0232,128 ± 10,9871,135 ± 67421.84 ± 8.480.85 ± 0.5120.99
4CNDND15,067 ± 7,509144 ± 1434.88 ± 2.450.05 ± 0.054.83
5CNDND19,069 ± 4,959320 ± 1167.02 ± 2.030.12 ± 0.046.90
6C0.050.0210,937 ± 3,839350 ± 3045.17 ± 1.850.17 ± 0.155.00
7CNDND7,028 ± 673  05.22 ± 0.42  ND5.22
8CNDND17,539 ± 18,348  08.89 ± 8.33  ND8.89
9CNDND7,842 ± 6,249167 ± 1907.58 ± 2.630.12 ± 0.137.46
10CND0.6716,151 ± 7,533762 ± 42110.18 ± 4.960.56 ± 0.319.62
11C0.070.054,812 ± 2,956154 ± 744.03 ± 2.220.14 ± 0.073.89
12CNDND10,092 ± 3,678  ND5.76 ± 2.28  ND5.76
13BNDND11,438 ± 6,449864 ± 1,0485.84 ± 3.330.42 ± 0.515.42
14B0.420.4314,100 ± 2,304985 ± 34813.08 ± 3.060.56 ± 0.4012.52
15BNDND20,787 ± 5,675891 ± 154311.74 ± 4.040.62 ± 1.0811.08
16BNDND4,913 ± 3,934285 ± 2435.17 ± 3.810.28 ± 0.244.89
17BNDND13,175 ± 4,488598 ± 4979.83 ± 3.340.44 ± 0.379.39
18BNDND26,597 ± 9,642815 ± 41015.60 ± 5.500.41 ± 0.2015.19
19B0.060.048,118 ± 2,764565 ± 4993.08 ± 0.750.20 ± 0.172.88
20BNDND6,340 ± 4,7281,447 ± 2,5065.33 ± 3.491.03 ± 1.784.30
21BNDND7,832 ± 8,628725 ± 7275.22 ± 5.660.51 ± 0.474.71
22BNDND3,984 ± 3,436  01.40 ± 1.25  ND1.40
23B0.48ND7,383 ± 3,609284 ± 2795.40 ± 1.780.24 ± 0.225.16
24BNDND15,954 ± 7891,201 ± 8236.12 ± 0.490.48 ± 0.275.64
25BND0.4610,999 ± 11,3242,129 ± 1,3724.66 ± 1.680.92 ± 0.743.74

NOTE: Each mean value represents the mean of three 24-hour urine collections. Baseline urinary DIM is also shown. Feeding order refers to which vegetable—Brussels sprouts or cabbage—the subject was randomized to eat during the first vegetable-eating period of the study. Overall mean urinary DIM after Brussels sprouts was significantly higher than after cabbage, with an average difference of 8.73 (95% CI, 5.36–12.10; P = 0.00002), taking into account order effect. Mean urinary DIM was slightly higher in the second vegetable-feeding period than in the first, but the difference was not significant (P = 0.21).

Abbreviations: C, cabbage; B, Brussels sprouts; ND, not detected; Cr, urine creatinine.