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Table 1 Means (and standard deviations) across illness perception (IPQ-R), social support (SSUK) and health- related quality of life (SF-36) scales and description of scores

From: A cross-sectional study on self-reported physical and mental health-related quality of life in rheumatoid arthritis and the role of illness perception

  Items in scale/ Ref Range Mean (SD) Min–max Higher score implies
Illness perception
 Identity 14 / 0–14 4.49 (2.54) 1–13 More symptoms experienced and attributed to RA
 Timeline (acute/chronic) 5 / 5–25 20.48 (3.53) 6–25 Stronger belief in chronic course of RA
 Consequences 5 / 5–25 15.00 (5.25) 5–24 Greater perceived influences of RA
 Treatment control 4 / 4–20 13.53 (2.66) 5–20 Greater perceived control by RA treatment
 Personal control 4 / 4–20 12.64 (3.32) 4–20 Greater perceived personal control
 Illness coherence 5 / 5–25 15.88 (4.21) 5–25 A better understanding of the illness
 Timeline (cyclical) 4 / 4–20 13.53 (3.30) 6–20 Stronger belief in repeated recurrence of RA
 Emotional representation 5 / 5–25 14.74 (5.16) 5–25 Greater feelings of concern about RA
Social support
 Positive support 4 / 0–16 12.7 (3.2) 4–16 Higher level of positive social support
 Negative interaction 4 / 0–16 5.5 (3.7) 5–16 Higher level of detrimental social interactions
Health-related quality of life
 Physical quality of life Mental quality of life / 38.38 (9.76) 13.84–57.34 Better physical quality of life
/ 46.94 (12.53) 13.89–68.98 Better mental quality of life
  1. RA rheumatoid arthritis