Table 2 Prevalence and accuracy and agreement of identification methods (weighted analyses)

PRISMA-7

  ≥ 3

24.8

0.849

0.830

0.869

0.469

0.818

0.800

0.836

0.612

  ≥ 4

11.9

0.723

0.693

0.753

0.442

0.699

0.676

0.722

0.476

  ≥ 5

3.6

0.594

0.594

0.594

0.270

0.546

0.523

0.569

0.131

Self-Rated Health

  ≤ 6

27.7

0.831

0.809

0.853

0.377

0.733

0.712

0.754

0.437

  ≤ 5

11.1

0.725

0.692

0.659

0.435

0.649

0.625

0.673

0.363

  ≤ 4

4.6

0.654

0.619

0.689

0.406

0.599

0.575

0.623

0.274

FI

  ≥ 0.20

32.9

0.766

0.743

0.789

0.303

0.784

0.765

0.802

0.498

  ≥ 0.25

14.8

0.813

0.787

0.839

0.566

0.747

0.724

0.769

0.568

  ≥ 0.30

7.4

0.693

0.662

0.724

0.461

0.644

0.620

0.667

0.376

  ≥ 0.35

4.9

0.648

0.617

0.680

0.397

0.608

0.584

0.631

0.296

  ≥ 0.40

1.8

0.578

0.547

0.609

0.244

0.540

0.517

0.563

0.118

Interrai Self-Reliance Screen

15.6

0.778

0.750

0.805

0.483

0.719

0.697

0.741

0.490

EFS

  ≥ 4

16.0

0.777

0.750

0.805

0.490

0.738

0.549

0.596

0.199

  ≥ 6

5.0

0.616

0.585

0.648

0.312

0.573

0.716

0.760

0.534

ATC

  ≥ 5

31.9

0.715

0.689

0.741

0.244

0.666

0.645

0.688

0.291

  ≥ 6

22.5

0.739

0.712

0.766

0.339

0.660

0.638

0.683

0.323

  ≥ 7

18.2

0.763

0.736

0.790

0.422

0.689

0.666

0.711

0407

Judgment GP

28.6

0.734

0.708

0.760

0.287

0.754

0.734

0.774

0.463

GFI

  ≥ 4

36.4

0.716

0.691

0.741

0.225

0.702

0.682

0.723

0.332

  ≥ 5

25.3

0.723

0.696

0.750

0.296

0.690

0.585

0.631

0.364

  ≥ 6

12.6

0.633

0.603

0.664

0.257

0.608

0.669

0.712

0.255

ISAR PC

  ≥ 2

52.9

0.649

0.624

0.675

0.117

0.635

0.614

0.656

0.185

  ≥ 3

49.6

0.668

0.643

0.693

0.139

0.657

0.637

0.677

0.223

  ≥ 4

49.6

0.668

0.643

0.693

0.139

0.657

0.637

0.677

0.223

Gait speed

23.9

0.865

0.846

0.884

0.478

0.754

0.732

0.776

0.490