Table 4.

 Eligibility criteria classified by content category and type of discrepancy of protocol and subsequent publications

Content category	No of trials	Total No (%) of eligibility criteria	No (%) of eligibility criteria
			Matching	Missing in publication	Modified in publication	Added in publication
Comorbidity	52	546 (42)	212 (39)	227 (41)	80 (15)	27 (5)
Treatment	49	258 (20)	107 (41)	105 (41)	34 (13)	12 (5)
Type or severity of illness	51	223 (17)	139 (62)	46 (21)	34 (15)	4 (2)
Pregnancy related criteria	43	73 (6)	35 (48)	34 (46)	2 (3)	2 (3)
Personal criteria	51	67 (5)	44 (66)	17 (25)	5 (7)	1 (2)
Diagnostic procedures	13	30 (2)	12 (40)	15 (50)	3 (10)	0
Other	47	102 (8)	57 (56)	35 (34)	5 (5)	5 (5)
Total		1299 (100)	606 (46)	479 (37)	163 (13)	51 (4)