Table 2

Hospitalisation rates for 160 patients with primary Sjögren syndrome and 466 comparators according to categorised primary discharge diagnoses, 1995–2016

Diagnosis category*Patients with primary Sjögren’s syndrome
(n=160; person-years=1592)
(n=466; person-years=4660)
Rate ratio (95% CIl)
Number of hospitalisationsRate per 100 person-yearsNumber of hospitalisationsRate per 100 person-years
Overall38524.289919.31.25 (1.11 to 1.41)
Infectious and parasitic diseases120.8300.61.20 (0.59 to 2.24)
Neoplasms181.1451.01.19 (0.67 to 1.99)
Endocrine, nutritional and metabolic diseases and immunity disorders241.5390.81.82 (1.08 to 2.98)
Mental illness130.8310.71.25 (0.63 to 2.30)
Diseases of the nervous system and sense organs140.9330.71.27 (0.65 to 2.28)
Diseases of the circulatory system744.71864.01.17 (0.89 to 1.52)
Diseases of the respiratory system392.5891.91.29 (0.87 to 1.86)
Diseases of the digestive system281.8942.00.88 (0.57 to 1.31)
Diseases of the genitourinary system221.4611.31.07 (0.64 to 1.70)
Complications of pregnancy; childbirth and the puerperium90.6200.41.36 (0.58 to  2.82)
Diseases of the skin and subcutaneous tissue70.4170.41.25 (0.48 to 2.80)
Connective tissue†523.31032.21.49 (1.05 to 2.05)
Injury and poisoning452.8912.01.46 (1.01 to 2.06)
Symptoms, signs and ill-defined conditions201.3420.91.41 (0.81 to 2.35)
  • *The following four categories with <5 hospitalisation in patients with primary Sjögren syndrome were excluded: diseases of the blood and blood-forming organs, congenital anomalies, certain conditions originating in the perinatal period, residual codes and unclassified.

  • †Two hospitalisations for Sicca syndrome were removed from diseases of the musculoskeletal system and connective tissue for comparability.