Had any kind of surgery

1652 (50.3)

5520 (38.6)

7172 (40.8)

<0.001

Hemodialysis

21 (0.6)

66 (0.5)

87 (0.5)

0.19

Contacting and using sharps and needles*

299 (9.1)

709 (5.0)

1008 (5.7)

<0.001