Table 2 Subgroup analyses assessing the association between night shift work and the risk of T2DM

Gender

Female

5

89,748

104,578

1.28

(1.16,1.41)

< 0.001

57.8

Male

4

4340

6806

1.53

(0.89,2.63)

0.128

45.8

BMI

≤ 30 kg/m2

2

22,549

6455

1.34

(0.81, 2.22)

0.255

87.4

> 30 kg/m2

2

7396

4018

1.14

(1.04, 1.25)

0.007

0

Profession

Medical workers

3

70,597

93,617

1.33

(1.22, 1.46)

< 0.001

33.3

Non-medical workers

6

47,524

18,147

1.27

(1.07, 1.52)

0.007

55.2

Night shift duration

≤ 5 years

2

70,425

73,519

1.05

(1.01, 1.10)

0.024

0

> 5 years

3

77,454

28,322

1.13

(1.09, 1.18)

< 0.001

0

≤ 10 years

3

89,399

77,454

1.06

(1.03, 1.10)

< 0.001

0

> 10 years

3

13,264

77,454

1.17

(1.10, 1.24)

< 0.001

0

Follow-up time

≤ 10 years

5

30,847

15,822

1.43

(1.09, 1.86)

0.009

64.0

> 10 years

4

87,274

95,942

1.30

(1.18, 1.43)

< 0.001

48.2

Age

≤ 60 years old

3

56,798

92,559

1.35

(1.20, 1.52)

< 0.001

44.6