Table 2 Descriptive statistics for individual birth cohorts and results from linear regressions for SCARED, sMFQ, SDQ parent-report and SDQ self-report

 1998

5.2 (6.7), n = 865

5.1 (6.9), n = 425

5.4 (6.5), n = 440

 1999

4.7 (5.7), n = 1785

4.5 (5.8), n = 890

4.9 (5.5), n = 895

 2000

4.8 (5.8), n = 1593

4.3 (5.5), n = 786

5.2 (6.1), n = 807

 2001

4.4 (5.7), n = 1579

3.8 (5.1), n = 799

4.9 (6.2), n = 780

 2002

5.0 (6.2), n = 1547

4.7 (5.9), n = 773

5.4 (6.5), n = 774

 2003

5.1 (6.8), n = 1647

4.6 (6.2), n = 841

5.7 (7.4), n = 806

 2004

5.2 (6.9), n = 1189

5.0 (7.0), n = 580

5.3 (6.9), n = 609

 2005

5.5 (6.8), n = 1300

5.6 (7.2), n = 662

5.5 (6.3), n = 638

 2006

6.0 (6.9), n = 1545

5.9 (7.3), n = 784

6.2 (6.6), n = 761

 2007

6.4 (7.4), n = 1310

6.0 (6.9), n = 653

6.9 (7.9), n = 657

 2008

6.6 (8.0), n = 619

6.2 (8.5), n = 300

6.9 (7.6), n = 319

 Linear regression

β = .187, p < .001 (95% CI: .151–.223)

β = .260, p < .001 (95% CI: .145–.245)

β = .260, p < .001 (95% CI: .128–.230)

 1998

1.00 (2.4), n = 925

1.0 (2.5), n = 458

1.0 (2.4), n = 467

 1999

1.1 (2.8), n = 1981

1.1 (2.7), n = 990

1.1 (2.8), n = 991

 2000

1.1 (2.7), n = 1824

1.0 (2.6), n = 908

1.1 (2.7), n = 916

 2001

1.3 (2.9), n = 1836

1.3 (2.8), n = 938

1.3 (3.0), n = 898

 2002

1.6 (3.1), n = 1903

1.6 (3.2), n = 952

1.5 (3.2), n = 951

 2003

1.5 (3.2), n = 1960

1.6 (3.3), n = 994

1.4 (3.1), n = 966

 2004

1.3 (2.7), n = 1504

1.4 (2.8), n = 751

1.2 (2.6), n = 753

 2005

1.2 (2.7), n = 1596

1.3 (2.8), n = 811

1.1 (2.6), n = 785

 2006

1.5 (3.2), n = 1832

1.7 (3.1), n = 941

1.4 (3.0), n = 891

 2007

1.6 (3.3), n = 1513

1.7 (3.4), n = 748

1.4 (3.2), n = 765

 2008

1.5 (3.1), n = 686

1.6 (3.3), n = 332

1.5 (2.9), n = 354

 Linear regression

β = .005, p = .024 (95% CI: .001–.009)

β = .003, p = .063 (95% CI: .000–.011)

β = .003, p = .184 (95% CI: −.002–.009)

 1994

1.1 (1.5), n = 1422

.83 (1.4), n = 644

1.3 (1.6), n = 778

 1995

1.1 (1.6), n = 1309

.95 (1.5), n = 674

1.3 (1.7), n = 635

 1996

1.1 (1.6), n = 1381

.80 (1.3), n = 681

1.4 (1.6), n = 700

 1997

1.2 (1.6), n = 1186

.81 (1.3), n = 623

1.5 (1.7), n = 563

 1998

1.2 (1.6), n = 1220

.82 (1.4), n = 623

1.4 (1.9), n = 575

 1999

1.2 (1.6), n = 1128

.88 (1.3), n = 553

1.5 (1.9), n = 575

 2000

1.2 (1.7), n = 1109

.77 (1.3), n = 495

1.6 (1.9), n = 571

 2001

1.3 (1.7), n = 1109

.81 (1.3), n = 503

1.7 (1.89), n = 606

 Linear regression

β = .220, p = .002 (95% CI: −.080--.360)

β = −.009, p = .299 (95% CI: −.026–.008)

β = .046, p = .001 (95% CI: .025–.066)

 1994

2.6 (2.2), n = 1372

1.7 (1.7), n = 578

3.3 (2.3), n = 794

 1995

2.5 (2.0), n = 1251

1.7 (1.8), n = 611

2.9 (2.1), n = 640

 1996

2.9 (2.2), n = 1608

2.0 (1.8), n = 759

3.6 (2.2), n = 849

 1997

3.0 (2.2), n = 1334

2.1 (1.8), n = 636

3.8 (2.3), n = 835

 1998

3.0 (2.3), n = 1443

2.1 (1.8), n = 608

3.7 (2.4), n = 835

 1999

3.1 (2.4), n = 1278

2.1 (1.9), n = 583

3.9 (2.4), n = 695

 2000

3.2 (2.4), n = 1266

2.1, (1.8), n = 533

4.0 (2.3), n = 722

 2001

3.3 (2.4), n = 1269

2.0 (1.8), n = 554

4.3 (2.4), n = 713

 Linear regression

β = .116, p < .001 (95% CI: .097–.135)

β = .054, p < .001 (95% CI: .032–.077)

β = .155, p < .001 (95% CI: .129–.181)