Table 2.

Incident RA/SLE by stressful life events, caregiving, depressive symptoms, moderate to severe joint pain or stiffness, and doctor diagnosed arthritis other than RA.

	Non-cases (n=74686)		RA/SLE (n=211)1		RA (n=184)
	N	%	N	%	N	%
Life events (all)
0	16797	22.5	39	18.5	32	17.4
1	23884	32.0	64	30.3	59	32.1
2	17410	23.3	42	19.9	34	18.5
3	9488	12.7	39	18.5	36	19.6
≥ 4	7107	9.5	27	12.8	23	12.5
Interpersonal
0	22895	30.7	60	28.4	47	25.5
1	29581	39.6	79	37.4	73	39.7
2	15581	20.9	51	24.2	46	25.0
≥ 3	6629	8.9	21	10.0	18	9.8
Financial stress
No	56448	75.7	151	71.6	133	72.3
Yes	18106	24.3	60	28.4	51	27.7
Missing	132
Abuse
None	66731	89.3	180	85.3	161	87.5
Verbal only	7215	9.7	26	12.3	20	10.9
Physical +/− verbal	740	1.0	5	2.4	3	1.6
Caregiving (days/week)
None/infrequent	44678	60.1	120	56.9	103	56.0
Up to 2 times/week	18869	25.4	54	25.6	49	26.6
3 or more times/week	10748	14.5	37	17.5	32	17.4
Missing	391		0
Depression (CES-D/DIS ≥ 0.06)
No	65827	89.8	167	82.7	148	84.6
Yes	7471	10.2	35	17.3	27	15.4
Missing	1388		9
Joint pain/stiffness
No symptoms	22137	29.7	25	11.8	23	12.5
Mild	34776	46.7	87	41.2	76	41.3
Moderate	13838	18.6	71	33.6	62	33.7
Severe	3706	5.0	28	13.3	23	12.5
Missing	229
Doctor diagnosed arthritis2	31978	42.8	107	50.7	92	50.0
Moderate-Severe joint pain/stiffness  + Diagnosed arthritis   + No diagnosed arthritis  Missing arthritis	12430 3808 1306	16.7 5.1	64 17 18	30.3 8.1	55 14 16	29.9 7.6

¹Total sample includes 8 cases of RA with SLE and 27 cases of SLE-only

²Doctor diagnosed arthritis other than RA, other non-specified or unknown type