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Table 4 Prevalence of risk factors for knee/hip osteoarthritis in people with prolonged persistent knee and hip pain

From: Association of osteoarthritis risk factors with knee and hip pain in a population-based sample of 29–59 year olds in Denmark: a cross-sectional analysis

  Women Men
Knee pain Hip pain Knee pain Hip
n = 142a n = 102a n = 123 n = 49
Age (years), mean (SD) 50.6 (6.6) 49.2 (7.7) 49.4 (7.7) 52.6 (6.7)
BMI (kg/m2), mean (SD) 28.4 (6.0) 27.3 (5.7) 28.1 (5.0) 28.5 (4.8)
Leisure time physical activity
 High intensity activities 2 (1) 0 (0) 3 (2) 0 (0)
 Moderate intensity activities 33 (23) 22 (22) 34 (28) 13 (27)
 Low intensity activities 85 (60) 67 (66) 65 (53) 26 (53)
 Sedentary 22 (15) 13 (13) 21 (17) 10 (20)
Previous knee/hip injury 85 (60) 38 (37) 79 (64) 25 (51)
Previous knee/hip surgery 51 (36) 12 (12) 46 (37) 9 (18)
Family history of osteoarthritis
 No 29 (20) 18 (18) 30 (24) 12 (24)
 I don’t know 23 (16) 20 (20) 31 (25) 11 (22)
 Yes 90 (63) 64 (63) 62 (50) 26 (53)
Knee alignment
 Varus 9 (6) 4 (4) 14 (11) 5 (10)
 Neutral 110 (79) 84 (83) 102 (83) 43 (88)
 Valgus 21 (15) 13 (13) 7 (6) 1 (2)
Foot rotation
 Feet rotated out 44 (31) 30 (30) 59 (48) 20 (41)
 Straight 80 (57) 62 (61) 62 (50) 27 (55)
 Feet rotated in 16 (11) 9 (9) 2 (2) 2 (4)
Occupational physical exposures
 Bending for 2 h or more 33 (24) 29 (29) 28 (23) 14 (29)
 Walking for 2 h or more over level ground 67 (48) 46 (46) 71 (58) 29 (59)
 Kneeling for 30 min or more 21 (15) 10 (10) 41 (33) 16 (33)
 Squatting for 30 min or more 18 (13) 6 (6) 21 (17) 9 (18)
 Climbing a total of 5 or more flights of stairs 14 (10) 4 (4) 20 (16) 9 (18)
 Lifting or moving objects of 10 kg or heavier 36 (26) 21 (21) 57 (46) 32 (65)
 Driving a car for 4 h or more 7 (5) 5 (5) 21 (17) 9 (18)
 None of the above 51 (36) 41 (41) 25 (20) 8 (16)
  1. Reported for the populations with prolonged persistent knee and hip pain (n = 416)
  2. Figures represent numbers and percentages unless otherwise stated
  3. aSome data is missing for the risk factors knee alignment, foot rotation and occupational physical exposures (women with knee pain: n = 140; women with hip pain: n = 101)