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Table 1 Population characteristics (n = 156)

From: The effectiveness of high molecular weight hyaluronic acid for knee osteoarthritis in patients in the working age: a randomised controlled trial

  intervention (n = 77) control (n = 79)
mean age, years (sd, range) 53.6 (8.6, 20.9–64.6) 54.8 (6,4, 32.9–64.9)
female, n (%) 37 (48) 40 (51)
BMI, kg/m2 mean (sd, range) 28.9 (5.2, 20.4–44.8) 29.2 (5.4,19.4–43.5)
K&L I-II, n (%) 44 (57) 47 (59)
K&L III, n (%) 33 (43) 32 (41)
duration knee complaints 3-12 M, n (%) 43 (56) 36 (46)
duration knee complaints > 12 M, n (%) 34 (44) 43 (54)
pain during rest (0–10) 1, mean (sd, range) 4.8 (2.5, 0–8.0) 4.1 (2.6, 0–10)
pain during activity (0–10) 1, mean (sd, range) 6.5 (2.4, 0–10) 5.8 (2.4, 0–10)
quality of life (0–1)2, mean (sd, range) 0.68 (0.23, −0.05-1) 0.71 (0.24, −0.11-1)
KOOS subscales (0–100), mean (sd, range)
pain 46.6 (20.6, 5.6–100) 52.5 (21.1, 11.1–100)
other symptoms 55.7 (18.3, 17.9–100) 61.3 (21.8, 3.6–100)
function in daily life 53.2 (20.2, 7.4–100) 60.2 (24.0, 10.3-100)
function in sports & recreation 24.0 (25.7, 0–95.0) 31.1 (30.9, 0–100)
knee related quality of life 30.8 (18.5, 0–68.8) 35.9 (18.7, 0–81.3)
  1. 1on Numeric Rating Scale, 2on EQ-5D questionnaire, K&L: Kellgren&Lawrence scale