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Table 4 Incidence rate. Follow-up duration of samples 6 months

From: Hashimoto’s thyroiditis increases the risk of new-onset systemic lupus erythematosus: a nationwide population-based cohort study

Variable

Total

Event (%)

Total person-years

Incidence rate (/105 years)

IRR (95%CI)

p value

Log-rank p

Proportional hazards assumption

Before PSM (1:20 age, sex matching)

Scenario 1

  Non-Hashimoto’s thyroiditis

309,065

218 (0.07)

1,511,589

14.42

Ref.

 

< 0.001

0.581

  Hashimoto’s thyroiditis

15,685

70 (0.45)

73,774

94.88

6.58 (5.03–8.61)

< 0.001

  

Scenario 2

  Non-Hashimoto’s thyroiditis

309,065

214 (0.07)

1,511,601

14.16

Ref.

 

< 0.001

0.631

  Hashimoto’s thyroiditis

15,686

70 (0.45)

73,776

94.88

6.70 (5.12–8.78)

< 0.001

  

Scenario 3

  Non-Hashimoto’s thyroiditis

309,075

168 (0.05)

1,511,836

11.11

Ref.

 

< 0.001

0.259

  Hashimoto’s thyroiditis

15,691

61 (0.39)

73,817

82.64

7.44 (5.55–9.97)

< 0.001

  

Scenario 4

  Non-Hashimoto’s thyroiditis

307,441

195 (0.06)

1,503,786

12.97

Ref.

 

< 0.001

0.259

  Hashimoto’s thyroiditis

15,147

52 (0.34)

71,547

72.68

5.60 (4.13–7.61)

< 0.001

  

1:2 PSM

Scenario 1

  Non-Hashimoto’s thyroiditis

30,524

35 (0.11)

149,139

23.47

Ref.

 

< 0.001

0.999

  Hashimoto’s thyroiditis

15,454

61 (0.39)

72,877

83.70

3.57 (2.35–5.40)

< 0.001

  

Scenario 2

  Non-Hashimoto’s thyroiditis

30,524

33 (0.11)

149,147

22.13

Ref.

 

< 0.001

0.871

  Hashimoto’s thyroiditis

15,454

61 (0.39)

72,877

83.70

3.78 (2.48–5.78)

< 0.001

  

Scenario 3

  Non-Hashimoto’s thyroiditis

30,524

18 (0.06)

149,187

12.07

Ref.

 

< 0.001

0.472

  Hashimoto’s thyroiditis

15,457

53 (0.34)

72,909

72.69

6.02 (3.53–10.28)

< 0.001

  

Scenario 4

  Non-Hashimoto’s thyroiditis

30,004

25 (0.08)

146,719

17.04

Ref.

 

< 0.001

0.844

  Hashimoto’s thyroiditis

15,129

52 (0.34)

71,481

72.75

4.27 (2.65–6.88)

< 0.001