. 2024 Aug 19;10(3):e004395. doi: 10.1136/rmdopen-2024-004395

Table 4. Estimated sensitivity of the 1997 ACR classification criteria for SLE and the 2019 EULAR/ACR classification criteria for SLE in the incident Southeast Norway SLE cohort during 2000–2017, at time of diagnosis, 2 years after diagnosis and at last visit in study period.

	Classification criteria	Proportion of cases meeting criteria, % (95% CI) n₁/n₂,
	Classification criteria	At time of diagnosis	2 years after diagnosis^*	At last visit in study period
Adult-onset SLE
Total	2019 EULAR/ACR	91.6 (89.5–93.6)642/701	92.7 (90.6–94.7)568/613	94.0 (92.3–95.8)659/701
Total	1997 ACR	77.3 (74.2–80.4)542/701	82.5 (79.5–85.5)506/613	84.3 (81.6–87.0)591/701
		P<0.001	P<0.001	P<0.001
Female	2019 EULAR/ACR	92.5 (90.4–94.7)546/590	93.6 (91.4–95.7)480/513	94.6 (92.7–96.4)558/590
Female	1997 ACR	79.0 (75.7–82.3)466/590	83.6 (80.4–86.8)429/513	85.6 (82.8–88.4)505/590
		P<0.001	P<0.001	P<0.001
Male	2019 EULAR/ACR	86.5 (80.1–92.8)96/111	88.0 (81.6–94.4)88/100	91.0 (85.7–96.3)101/111
Male	1997 ACR	68.5 (59.8–77.1)76/111	77.0 (68.6–85.2)77/100	77.5 (69.7–85.2)86/111
		P<0.001	P<0.05	P<0.05
Juvenile-onset SLE^‡
Total	2019 EULAR/ACR	97.2 (91.9–102.6)35/36	100 (100–100)25/25	97.2 (91.9–102.6)35/36
Total	1997 ACR	88.9 (78.6–99.2)32/36	92.0 (81.4–102.6)23/25	91.7 (82.6–100.7)33/36
Female	2019 EULAR/ACR	96.6 (89.9–103.1)28/29	100 (100–100)21/21	96.6 (89.9–103.2)28/29
Female	1997 ACR	89.7 (78.5–100.7)26/29	90.5 (77.9–102.6)19/21	89.7 (78.6–100.7)26/29
Male	2019 EULAR/ACR	100^†7/7	100^†4/4	100^†7/7
Male	1997 ACR	85.7^†6/7	100^†4/4	100^†7/7

The 1997 ACR criteria, the 1997 American College of RheumatologyACR classification criteria for Systemic Lupus ErythematousSLE; the 2019 EULAR/ACR criteria, the 2019 European Alliance of Associations for Rheumatology/American College of RheumatologyEULAR/ACR classification criteria for Systemic Lupus Erythematous; n, number of cases fulfilling the criteria; n total number of cases at visit,SLE.

n₁, number of cases fulfilling the criteria; n_2,, total number of cases at visit

eEstimated sensitivity two2 years after diagnosis includes only the 64238 incident cases during 2000–2015 to allow for two2-year follow upfollow-up for all cases.

^†

lLess than 10 cases cases, and to scarce for statistical analysis.

^‡

2019 EULAR/ACR criteria fulfilment vs 1997 ACR criteria fulfilment did not differ significantly.

EULAR/ACREuropean Alliance of Associations for Rheumatology/American College of RheumatologySLEsystemic lupus erythematosus