Table 2.

 Division of 40 journals into development and validation sets

Rank*	Journal	Total contributed articles (n=4657)	Articles with renal information (%)
Development set
1	Nephrology Dialysis Transplantation	168	94.6
2	Transplantation Proceedings	171	59.7
3	Journal of the American Society of Nephrology	102	87.3
4	American Journal of Kidney Diseases	85	90.6
5	Pediatric Nephrology	83	67.5
6	American Journal of Transplantation	96	44.8
7	New England Journal of Medicine	376	3.7
8	Diabetes Care	184	5.4
9	American Journal of Medicine	107	7.5
10	Journal of Hypertension	89	9
11	Radiology	136	5.1
12	Journal of Vascular Surgery	73	6.8
13	Lancet	386	0.8
14	Archives of Disease in Childhood	87	3.4
15	Journal of Trauma-Injury Infection & Critical Care	120	1.7
16	Diabetic Medicine	60	1.7
17	Surgical Endoscopy	101	1
18	Journal of the Association of Physicians of India	50	2
19	Calcified Tissue International	22	4.5
20	Journal of Human Genetics	41	2.4
21	Journal of Infection	39	0
22	Journal of Viral Hepatitis	29	0
23	American Journal of Clinical Oncology	22	0
24	Netherlands Journal of Medicine	22	0
Total		2649	22.3
Validation set
1	Kidney International	187	79.7
2	Transplantation	168	37.5
3	Peritoneal Dialysis International	49	100
4	Clinical Transplantation	46	50
5	Journal of Urology	219	10.1
6	Annals of Internal Medicine	130	6.9
7	BMJ	477	1.3
8	Annals of Thoracic Surgery	289	1.7
9	Investigative Radiology	48	6.3
10	Journal of Pediatrics	96	2.1
11	Clinical Pharmacology and Therapeutics	30	3.3
12	American Journal of Clinical Pathology	58	1.7
13	Bone Marrow Transplantation	101	0
14	Family Practice	57	0
15	East African Medical Journal	31	0
16	Diabetes/Metabolism Research Reviews	22	0
Total		2008	16.6

*Ranked by number of articles with renal information.