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Table 1

From: Methodological quality of studies of end-stage renal disease risks in lupus nephritis

Quality measure

Observational studies (n= 132)

Clinical trials (n= 42)

1. ACR criteria for SLE used

88.3

88.1

2. Measure of renal function included

77.2

95.2

3. Treatments described

84.1

100

4. Community-based study

11.3

Not applicable

5. Inception cohort

40.1

11.9

6. Renal biopsy not required for inclusion

37.1

35.7

7. Patients with chronic kidney disease not excluded

80.3

23.8

8. Losses to follow-up described

24.2

42.8

9. Losses to follow-up < 20%

18.9

30.9

10. Data reported using Kaplan-Meier curves

36.3

9.5