Table 6 Meta-regression of factors for IgG anti-MAA⁺ frequency in RA patients

Without factor

-

-

2.23 (1.18, 7.61)

-

Previously associated factors

 AF ancestry (%)^a

0.25

0.032

1.56 (0.89, 6.43)

0.300

 Anti-CCP (%)

 − 0.06

0.8

2.21 (1.26, 9.09)

0.009

 Women (%)

 − 0.81

0.0070

1.32 (0.75, 5.53)

0.408

 Smokers (%)

0.61

0.10

1.77 (1.01, 7.36)

0.206

 Age (years)

0.03

0.6

2.18 (1.25, 8.99)

0.022

 Time since diagnosis (y)

0.04

0.7

2.27 (1.28, 10.52)

0.000

Potential confounders

 Percentile

 − 0.03

0.5

2.15 (1.23, 8.81)

0.036

 Military (yes)

1.83

0.032

1.56 (0.89, 6.44)

0.300

 Site (N/O)^b

2.03

0.0044

1.27 (0.72, 5.27)

0.431

 Site (L/O’)^c

 − 0.43

0.6

2.18 (1.25, 8.99)

0.022

Best forward selection model^d

 Site (N/O)^b

2.03

0.0044

1.27 (0.72, 5.27)

0.430

Best backward elimination model^d

 AF ancestry (%)

0.35

4.1 × 10⁻⁶

0.58 (0.35, 3.12)

0.740

 Smokers (%)

0.94

2.7 × 10⁻⁵