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Table 2 Percentage of cross-over trial participants reporting increased flatulence each week by food type

From: Perceptions of flatulence from bean consumption among adults in 3 feeding studies

  Flatulence Change Cross-over Trials
   BEP Study BB Study
Week # All Beans
% (n)
Pinto beans
(n = 17)
Black eyed peas
(n = 17)
Vegetarian
Baked beans
(n = 29)
Control (carrots) (n = 39*)
1 35% (26) 50% (8) 19% (3) 47% (14) 3% (1)
2 19% (14) 6% (1) 12% (2) 24% (7) 11% (4)
3 15% (11) 0 6% (1) 29% (8) 5% (2)
4 11% (8) 12% (2) 6% (1) 11% (3) 5% (2)
5 5% (4) 6% (1) 0 11% (3) 0
6 5% (4) 6% (1) 6% (1) 7% (2) 0
7 5% (4) 0 6% (1) 11% (3) 0
8 3% (3) 6% (1) 6% (1) 7% (2) 0
X 2 P value <0.001 <0.001 0.653 <0.001 0.075
  1. *Seven people participated in both cross-over trials and thus completed only one control phase.