Table 1.

Hospitalisation rates for 160 patients with primary Sjögren’s syndrome and 466 comparators, 1995–2016

Characteristic	Value	Patients with primary Sjögren’s syndrome			Comparators			Rate ratio (95% CI)
		Number of hospitalisations	Person-years of observation	Rate per 100 person-years	Number of hospitalisations	Person-years of observation	Rate per 100 person-years
Overall		385	1592	24.2	899	4660	19.3	1.25 (1.11 to 1.41)
Age	17–49	51	281	18.2	73	809	9.0	2.02 (1.40 to 2.87)
	50–64	57	518	11.0	163	1504	10.8	1.02 (0.75 to 1.37)
	65–74	85	346	24.6	214	987	21.7	1.14 (0.88 to 1.45)
	75+	192	447	43.0	449	1361	33.0	1.30 (1.10 to 1.54)
Sex	Male	34	141	24.0	56	381	14.7	1.64 (1.06 to 2.49)
	Female	351	1450	24.2	843	4279	19.7	1.23 (1.08 to 1.39)
Calendar year of follow-up	1995–1999	52	220	23.6	101	616	16.4	1.45 (1.03 to 2.00)
	2000–2004	70	257	27.2	165	785	21.0	1.30 (0.98 to 1.71)
	2005–2009	97	424	22.9	279	1254	22.2	1.03 (0.81 to 1.29)
	2010–2016	166	690	24.1	354	2005	17.7	1.36 (1.13 to 1.64)
Years after index date	0–4	130	507	25.6	251	1512	16.6	1.55 (1.25 to 1.91)
	5–9	90	422	21.3	220	1212	18.1	1.18 (0.92 to 1.50)
	10–14	71	279	25.4	168	812	20.7	1.23 (0.92 to 1.61)
	15–19	41	166	24.7	101	484	20.8	1.19 (0.82 to 1.69)
	20+	53	218	24.4	159	640	24.8	0.99 (0.72 to 1.33)