Table 2 Weighted Cox regression analysis on the association of dietary patterns and mortality among RA patients

DII

Q1(> 2.84)

Reference

Reference

Reference

Q2(1.79,2.84)

1.25[0.92,1.68]

0.2

0.98[0.72,1.34]

> 0.9

1.21[0.85,1.72]

0.6

Q3(0.37,1.79)

0.78[0.56,1.11]

0.2

0.71[0.51,0.97]

0.03

0.94[0.65,1.38]

0.8

Q4(< 0.37)

0.72[0.49,1.08]

0.11

0.59[0.38,0.91]

0.02

0.85[0.53,1.35]

0.5

P for trend

0.016

0.003

0.08

HEI-2015

Q1(< 41.67)

Reference

Reference

Reference

Q2(41.67,49.98)

1.09[0.79,1.52]

0.6

0.81[0.58,1.12]

0.3

0.86[0.60,1.23]

0.4

Q3(49.98,58.75)

1.09[0.81,1.47]

0.6

0.64[0.47,0.86]

0.003

0.77[0.56,1.05]

0.1

Q4(> 58.75)

1.01[0.68,1.51]

> 0.9

0.53[0.36,0.78]

0.001

0.69[0.47,1.01]

0.05

P for trend

0.9

< 0.001

0.05

Composition effect

Unhealthy and Pro

-Inflammatory diet(DII > 1.78 and HEI-2015 < 49.95)

Reference

Reference

Reference

Combined diet pattern^d

(DII < 1.78 and HEI-2015 < 49.95;or DII > 1.78 and HEI-2015 > 49.95)

0.86[0.63,1.17]

0.3

0.65[0.50,0.85]

0.002

0.74[0.57,0.98]

0.04

Healthy and Anti

-Inflammatory diet

(DII < 1.78 and HEI-2015 > 49.95)

0.75[0.55,1.01]

0.06

0.53[0.39,0.72]

< 0.001

0.70[0.53,0.92]

0.01

P for trend

0.06

< 0.001

0.02