Variables

Stage

NSAIDs users

Frequency (%)

Controls

Frequency (%)

X²

P-value

n = 100

n = 100

eGFR

(ml/min)

≥90

1

47

81

13.54

<0.001*

60 - 89

2

31

13

45 - 59

3a

10

6

30 - 44

3b

11

0

15 - 29

4

1

0

<15

5

0

0