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Table 2 Average number of drug covariates/ true predictors retained after filtering and average number of cases according to scenario settings

From: New adaptive lasso approaches for variable selection in automated pharmacovigilance signal detection

Scenario

β0

nTP

βTP

Average number of covariates retained after filtering

Average number of true predictors retained after filtering

Average number of cases

No true predictors

1

-2

0

0

389

NA

11 923

2

-4

0

0

165

NA

1 798

3

-6

0

0

30

NA

247

True predictors reported more than 100 times

4

-2

5

1

394

5

12 327

5

-2

5

2

400

5

12 937

6

-2

20

1

407

20

13 589

7

-2

20

2

424

20

15 956

8

-4

5

1

172

5

1 879

9

-4

5

2

184

5

2 083

10

-4

20

1

193

20

2 155

11

-4

20

2

237

20

3 121

12

-6

5

1

34

2

259

13

-6

5

2

44

4

294

14

-6

20

1

49

11

300

15

-6

20

2

95

18

507

True predictors reported between 20 to 100 times

16

-2

5

1

391

5

11 958

17

-2

5

2

392

5

12 013

18

-2

20

1

396

20

12 064

19

-2

20

2

400

20

12 284

20

-4

5

1

167

2

1 805

21

-4

5

2

171

4

1 822

22

-4

20

1

175

8

1 827

23

-4

20

2

191

17

1 897

24

-6

5

1

30

0

248

25

-6

5

2

31

0

251

26

-6

20

1

31

0

251

27

-6

20

2

35

2

263