Table 1 Demographic and clinical characteristics at baseline (n = 3266)
Variable | Total | Low SE pain ≤62 | High SE pain > 62 | p-value | Low SE OS ≤68 | High SE OS > 68 | p-value |
|---|---|---|---|---|---|---|---|
Paina, mean (SD) | |||||||
baseline | 48.48 (18.48) | 52.96 (16.86) | 43.46 (18.88) | < 0.01c* | 52.60 (17.46) | 43.86 (18.48) | < 0.01c* |
3 months | 37.68 (19.68) | 42.35 (19.11) | 32.56 (19.00) | < 0.01c* | 42.17 (19.06) | 32.92 (19.28) | < 0.01c* |
1 year | 39.97 (20.34) | 44.24 (19.26) | 35.23 (20.45) | < 0.01c* | 43.96 (19.73) | 35.54 (20.19) | < 0.01c* |
Physical activityb, mean (SD) | |||||||
baseline | 5.22 (2.05) | 5.12 (2.15) | 5.33 (1.92) | < 0.01c* | 4.99 (2.17) | 5.47 (1.87) | < 0.01c* |
3 months | 5.45 (1.76) | 5.40 (1.81) | 5.50 (1.70) | 0.11c | 5.29 (1.84) | 5.60 (1.65) | < 0.01c* |
1 year | 5.14 (1.91) | 5.06 (1.99) | 5.24 (1.81) | < 0.01*c | 4.99 (2.01) | 5.31 (1.78) | < 0.01c* |
Age, yrs | |||||||
mean (SD) | 64.73 (9.22) | 66.33 (9.30) | 64.01 (9.08) | < 0.01*c | 65.42 (9.57) | 63.90 (8.74) | < 0.01c* |
min–max | 27–93 | 32–93 | 27–89 | 32–93 | 27–88 | ||
Gender,n(%) | |||||||
male | 923 (28.26) | 495 (28.98) | 420 (27.50) | 0.35d | 465 (27.26) | 442 (29.33) | 0.19d |
female | 2343 (71.74) | 1213 (71.5) | 1107 (72.50) | 1241 (72.74) | 1065 (70.67) | ||
Marital status,n(%) | |||||||
cohabiting | 2419 (74.29) | 1235 (72.48) | 1161 (76.23) | 0.01d* | 1208 (70.98) | 1168 (77.66) | < 0.01d* |
living alone | 837 (25.71) | 469 (27.52) | 362 (23.77) | 494 (29.02) | 336 (22.34) | ||
Born in Sweden,n(%) | |||||||
yes | 3013 (92.37) | 1569 (91.92) | 1419 (92.99) | 0.25d | 1559 (91.44) | 1410 (93.63) | 0.02d* |
no | 249 (7.63) | 138 (8.08) | 107 (7.01) | 146 (8.56) | 96 (6.37) | ||
Education,n(%) | |||||||
compulsory school | 1213 (37.37) | 714 (42.02) | 484 (31.86) | < 0.01d* | 710 (41.89) | 478 (31.85) | < 0.01d* |
upper secondary school | 1118 (34.44) | 601 (35.37) | 514 (33.84) | 594 (35.04) | 512 (34.11) | ||
university | 915 (28.19) | 384 (22.60) | 521 (34.30) | 391 (23.07) | 511 (34.04) | ||
BMI, kg/m2,n(%) | |||||||
underweight < 18.5 | 64 (2.01) | 34 (2.04) | 27 (1.82) | 0.04d* | 33 (1.99) | 27 (1.84) | < 0.01d* |
normal weight 18.5–24.9 | 877 (27.59) | 425 (25.56) | 442 (29.76) | 426 (25.72) | 436 (29.66) | ||
overweight 25–29.9 | 1338 (42.09) | 706 (42.45) | 618 (41.62) | 678 (40.94) | 636 (43.27) | ||
obese ≥30 | 900 (28.31) | 498 (29.95) | 398 (26.80) | 519 (31.34) | 371 (25.24) | ||
Most affected joint,n(%) | |||||||
hip | 894 (27.37) | 498 (29.16) | 388 (25.41) | 0.02d* | 492 (28.84) | 388 (25.75) | 0.05d |
knee | 2372 (72.63) | 1210 (70.84) | 1139 (74.54) | 1214 (71.16) | 1119 (74.25) | ||
Affected other hip/knee,n(%) | |||||||
no | 1459 (45.13) | 701 (41.55) | 746 (49.18) | < 0.01d* | 727 (43.12) | 713 (47.63) | 0.01d* |
yes | 1774 (54.87) | 986 (58.45) | 771 (50.82) | 959 (56.88) | 784 (52.37) | ||
Walking difficulty,n(%) | |||||||
no | 539 (16.70) | 176 (10.44) | 357 (23.58) | < 0.01d* | 178 (10.58) | 352 (23.53) | < 0.01d* |
yes | 2689 (83.3) | 1510 (88.1) | 1157 (76.42) | 1505 (89.42) | 1144 (76.47) | ||