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Table 1 Characteristics of the datasets used in the unrestricted and restricted analyses

From: Benefits of applying a proxy eligibility period when using electronic health records for outcomes research: a simulation study

Percentage with missing data

Unrestricted analysis

Restricted analysis

N

Mean (SD) months of data

N

Mean (SD) months of data

10%

6,717

11.4 (0.01)

6,045

12 (0)

20%

6,717

10.8 (0.02)

5,373

12 (0)

30%

6,717

10.2 (0.02)

4,701

12 (0)

40%

6,717

9.6 (0.02)

4,030

12 (0)

50%

6,717

9.0 (0.03)

3,358

12 (0)

60%

6,717

8.4 (0.03)

2,686

12 (0)

70%

6,717

7.8 (0.03)

2,015

12 (0)

80%

6,717

7.2 (0.04)

1,343

12 (0)

90%

6,717

6.6 (0.04)

671

12 (0)