Table 2 Recommended weight for data analysis of the initial cohort of the Thai Nurse Cohort Study

Lower than 25

9352

747

0.0799

12.5194

25–29

22 664

1308

0.0577

17.3272

30–34

32 807

1760

0.0536

18.6403

35–39

24 400

2690

0.1102

9.0706

40–44

21 760

3155

0.1450

6.8970

45–49

17 640

3584

0.2032

4.9219

50–54

7827

2971

0.3796

2.6345

55–59

4572

2043

0.4469

2.2379

60 or greater

1677

498

0.2970

3.3675

Total

142 699

18 756