Table 1

Characteristics in patients with JDM controls

CharacteristicsnJDM patientsControls
Women5936 (61)36 (61)
Follow-up
 Weight (kg)5962.6 (20.1)64.9 (19.9)
 Height (cm)59165.5 (15.0)167.5 (15.8)
 Body mass index (kg/m2)5922.3 (4.8)22.5 (4.5)
 Total-cholesterol (mmol/L)554.2 (0.80)4.6 (0.89)*
 HDL-cholesterol (mmol/L)571.2 (0.32)1.5 (0.38)**
 LDL-cholesterol (mmol/L)572.3 (0.70)2.7 (0.78)*
 HDL/LDL-ratio560.54 (0.19)0.60 (0.26)
 Lipoprotein A (mg/L)51321 (226)359 (360)
 Daily smokers4811 (23)8 (17)
 Prednisolone or DMARD5917 (29)NA
 MDI total593 (0–13)NA
 DAS total595 (0–13)NA
One year postdiagnosis
 MDI total591 (0–7)NA
 DAS total595 (0–15)NA
  • Values are number (%), mean (SD) or median (range).

  • n is referring to number of pairs, except in the parameters prednisolone or DMARD (use of prednisolone or disease modifying antirheumatic drugs at follow-up), MDI (Myositis Damage Index) and DAS (Disease Activity Score) where it refers to number of patients.

  • n=51, n=55, n=56 and n=57 is due to inconclusive laboratory analyses in some of the pairs. n=48 is because smoking was assessed in those ≥14 years only. MDI and DAS at 1 year were scored retrospectively from chart reviews.

  • The differences in weight, height and body mass index were not significant.

  • *p Value<0.01.

  • **p Value≤0.001.

  • HDL, high density lipoprotein; JDM, juvenile dermatomyositis; LDL, low density lipoprotein; NA, not applicable.