Table 5 The sensitivity analysis for the adjusted hazard ratio stratified by duration of diabetes mellitus, gender and age groups

 < 2

1.47 (1.36–1.60)

3.79 (3.26–4.41)

7.76 (6.93–8.69)

2.20 (1.83–2.63)^b

4.06 (3.39–4.88)^b

 2–5

1.89 (1.7–2.09)

5.15 (4.36–6.08)

9.63 (8.15–11.38)

2.21 (1.79–2.73)^b

3.46 (2.71–4.41)^b

 ≥ 5

2.29 (1.98–2.65)

8.04 (6.56–9.87)

13.74 (11.04–17.11)

3.07 (2.33–4.03)^b

4.14 (2.98–5.76)^b

 P for interaction

0.3526

 Male

1.35 (1.23–1.47)

4.36 (3.75–5.06)

8.30 (7.37–9.34)

2.70 (2.24–3.25)^b

4.00 (3.29–4.86)^b

 Female

2.05 (1.9–2.21)

5.23 (4.6–5.95)

9.48 (8.36–10.75)

2.12 (1.81–2.49)^b

3.81 (3.18–4.57)^b

 P for interaction

0.0618

 < 40

0.22 (0.11–0.43)

0.22 (0.03–1.54)

3.96 (2.46–6.37)

1.51 (0.17–13.26)

16.99 (3.61–80.01)^b

 40–59

0.73 (0.65–0.82)

2.49 (2.07–2.99)

7.57 (6.75–8.48)

2.85 (2.26–3.58)^b

5.96 (4.79–7.41)^b

 60–79

3.60 (3.36–3.86)

8.48 (7.53–9.57)

13.41 (11.65–15.43)

2.16 (1.86–2.51)^b

2.72 (2.25–3.28)^b

 ≥ 80

3.13 (2.21–4.43)

12.75 (8.22–19.76)

12.53 (6.74–23.29)

2.96 (1.51–5.81)^b

2.30 (0.95–5.61)

 P for interaction

< 0.0001