Table 1

Characteristics and cardiac symptoms in patients with juvenile dermatomyositis (JDM) and controls

CharacteristicsPatients with JDMControls*
Female sex36 (61)36 (61)
Age at disease onset, years7.8 (1.4–17.3)NA
Age at diagnosis, years8.9 (2.1–19.2)NA
Variables assessed at 16.8-year follow-up
 Duration from disease onset, years16.8 (2.0–38.1)NA
 Age, years21.5 (6.7–55.4)21.6 (6.2–55.4)
 Height, cm165.5 (15.0)167.5 (15.8)
 Weight, kg62.6 (20.1)64.9 (19.9)
 BP systolic, mm Hg117 (22.2)111 (13.6)
 BP diastolic, mm Hg70 (13.3)67 (9.3)
 HR, beats/min69 (13.9)63 (11.1)
 Body mass index, kg/m222.3 (4.8)22.5 (4.5)
 Smokers, daily11 (23)8 (17)
 Smokers, weekly15 (31)17 (35)
 Smokers, previously daily3 (6)5 (10)
 Dyspnoea on exertion7 (12)0§
Antihypertensive treatment
 ACE inhibitor2
 Calcium blocker1
 β Blocker1
  • Values are number (%), median (range) or mean (SD) unless otherwise stated; n=59.

  • * Sex-matched and age-matched controls from the general population.

  • p=0.017.

  • Patients and controls ≥14 years at follow-up, n=48.

  • § p<0.016.

  • ACE, angiotensin-converting enzyme; BP, blood pressure; HR, heart rate from electrocardiography (ECG); NA, not applicable.