Table 4. Risk score for developing RA-ILD (with and without biomarkers).

	Score Points
Variable*	Without biomarkers	With biomarkers
Smoking pack-years ≥30	1·9	2·3
DAS28-CRP ≥3.2	1·2	1·2
Current glucocorticoid use	1·0	1·2
BMI ≥30 kg/m2	0·4	0·8
Filaggrin 48–65 cit 2 cyclic (IgG), highest tertile		2·0
H4 33–48 cit 39 (IgA2), lowest tertile		1·9
H2A/a-2 1–20 (IgA2), highest tertile		1·8
MUC5B promoter variant present		0·1

BMI = body mass index, CI = confidence interval, CRP = C-reactive protein, Ig = immunoglobulin, ILD = interstitial lung disease, OR = odds ratio, RA = rheumatoid arthritis

^*Intended to be recorded as of time of calculation