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Table 6 Number of observations Dropped and Retained per cohort and matching estimator

From: Food environment and childhood obesity: the effect of dollar stores

   

2004 cohort

2005 cohort

2006 cohort

   

Dropped

Retained

Dropped

Retained

Dropped

Retained

Movers & Stayers

2NN-nc

Non-exp

5114

423

5031

963

5543

477

  

Exp

1675

620

1853

752

2045

415

 

5NN-nc

Non-exp

4728

809

4347

1647

5134

886

  

Exp

1318

977

1372

1233

1736

724

 

2NN-1/4c

Non-exp

5114

423

5033

961

5547

473

  

Exp

1677

618

1859

746

2052

408

 

5NN-1/4c

Non-exp

4729

808

4349

1645

5139

881

  

Exp

1320

975

1378

1227

1744

716

Movers

2NN-nc

Non-exp

442

337

485

483

457

333

  

Exp

51

259

72

290

40

223

 

5NN-nc

Non-exp

281

498

262

706

289

501

  

Exp

11

299

24

338

19

244

 

2NN-1/4c

Non-exp

444

335

488

480

459

331

  

Exp

51

259

74

288

46

217

 

5NN-1/4c

Non-exp

283

496

264

704

291

499

  

Exp

11

299

26

336

25

238

Stayers

2NN-nc

Non-exp

4737

21

4643

383

5155

75

  

Exp

1772

213

1935

308

2152

45

 

5NN-nc

Non-exp

4726

32

4367

659

5083

147

  

Exp

1638

347

1707

536

2122

75

 

2NN-1/4c

Non-exp

4750

8

4657

369

5160

70

  

Exp

1176

209

1937

306

2165

32

 

5NN-1/4c

Non-exp

4744

14

4381

645

5093

137

  

Exp

1642

343

1709

534

2138

59

  1. Notes: Non-exp = non exposed, Exp = exposed, 2NN-nc = 2 Nearest Neighbors-no caliper, 5NN-nc = 5 Nearest Neighbors-no caliper, 2NN-1/4c = 2 Nearest Neighbors-caliper equal to 1/4 of the SD of the estimated propensity score, 5NN-1/4c = 5 Nearest Neighbors-caliper equal to 1/4 of the SD of the estimated propensity score