Table 1.

Baseline characteristics of abstracts

	CCT N (%)	OCR N (%)	BSS N (%)	total N
total sampled	326	455	219	1,000
descriptive studies (excluded)	-	119	45	164
total in analysis	326	336	174	836
acceptance of abstract
accepted	227 (70)	214 (64)	101 (58)	542
rejected	99 (30)	122 (36)	73 (42)	294
country region of origin
US/Canada	88 (27)	128 (38)	95 (55)	311
NW-Europe/Australia	138 (42)	107(32)	34 (20)	279
SE-Europe/Mediterranean	52 (16)	44(13)	9(5)	105
other	48 (15)	57(17)	36(21)	141
number of study centers
1–2	280 (86)	324 (96)	173 (99)	777
>3	46 (14)	12 (12)	1(1)	59
statistical significance
positive	140 (43)	149 (44)	65 (37)	354
negative	99 (30)	41 (12)	7(4)	147
equivocal	87 (27)	146 (44)	102 (59)	335