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Table 2 Risk of bias for trials done in countries contributing 20 or more trials

From: Tolerating bad health research: the continuing scandal

Country Number of trials High Unclear Low
Multinational 193 100 (52%) 48 (25%) 45 (23%)
Australia 41 27 (66%) 10 (24%) 4 (10%)
Brazil 27 16 (59%) 10 (37%) 1 (4%)
Canada 40 26 (65%) 12 (30%) 2 (5%)
China 87 56 (64%) 23 (26%) 7 (8%)
France 31 11 (35%) 16 (52%) 4 (13%)
Germany 48 40 (83%) 7 (15%) 1 (2%)
India 48 35 (73%) 6 (13%) 5 (10%)
Iran 49 30 (61%) 18 (37%) 0 (0%)
Italy 47 30 (64%) 17 (36%) 0 (0%)
Japan 42 22 (52%) 16 (38%) 4 (10%)
Korea 32 18 (56%) 11 (34%) 1 (3%)
Netherlands 22 17 (77%) 5 (23%) 0 (0%)
Spain 29 25 (86%) 2 (7%) 1 (3%)
Sweden 26 16 (62%) 7 (27%) 2 (8%)
Turkey 32 18 (56%) 9 (28%) 2 (6%)
UK 114 63 (55%) 38 (33%) 12 (11%)
USA 280 168 (60%) 98 (35%) 12 (4%)