Table 1

Prevalence of structural abnormalities as assessed on MRI on different locations in the knee in the total NEO study population

n=1284
Grade 0 (n (%))Grade 1 (n (%))Grade 2 (n (%))Grade 3 (n (%))
Baker's cyst894 (70)245 (19)100 (8)45 (4)
Effusion253 (20)848 (66)163 (13)20 (2)
Tibiofemoral compartment:
Osteophytes
 Femoral condyle medial/lateral186 (14)/293 (23)946 (74)/882 (69)122 (10)/88 (7)30 (2)/21 (2)
 Tibial plateau medial/lateral801 (62)/929 (72)436 (34)/310 (24)41 (3)/36 (3)6 (0)/9 (1)
Cartilage defects
 Femoral condyle medial/lateral544 (42)/1031 (80)563 (44)/180 (14)142 (11)/65 (5)35 (3)/8 (1)
 Tibial plateau medial/lateral409 (32)/1077 (84)733 (57)/102 (8)129 (10)/88 (7)13 (1)/17 (1)
Bone marrow lesions
 Femoral condyle medial/lateral1078 (84)/1185 (92)109 (8)/49 (4)95 (7)/48 (4)2 (0)/2 (0)
 Tibial plateau medial/lateral1136 (88)/1199 (93)61 (5)/36 (3)82 (6)/45 (4)5 (0)/4 (0)
Cysts
 Femoral condyle medial/lateral1268 (99)/1268 (99)15 (1)/12 (1)0 (0)/4 (0)1 (0)/0 (0)
 Tibial plateau medial/lateral1251 (97)/1257 (98)18 (1)/15 (1)11 (1)/6 (0)4 (0)/6 (0)
Patellofemoral compartment:
Osteophytes
 Patellar crest1270 (99)7 (1)5 (0)2 (0)
 Patellar facet medial/lateral527 (41)/1057 (82)642 (50)/200 (16)103 (8)/27 (2)12 (1)/0 (0)
 Trochlear facet medial/lateral897 (70)/1006 (78)325 (25)/241 (19)42 (3)/28 (2)19 (1)/9 (1)
Cartilage defects
 Patellar crest448 (35)393 (31)275 (21)168 (13)
 Patellar facet medial/lateral445 (35)/770 (60)346 (27)/336 (26)332 (26)/126 (10)161 (13)/52 (4)
 Trochlear facet medial/lateral607 (47)/837 (65)513 (40)/362 (28)149 (12)/58 (5)15 (1)/27 (2)
Bone marrow lesions
 Patellar crest1005 (78)109 (8)170 (13)0 (0)
 Patellar facet medial/lateral1173 (91)/1218 (95)69 (5)/41 (3)42 (3)/24 (2)0 (0)/1 (0)
 Trochlear facet medial/lateral1208 (94)/1210 (94)45 (4)/27 (2)30 (2)/45 (4)1 (0)/2 (0)
Cysts
 Patellar crest1244 (97)35 (3)5 (0)0 (0)
 Patellar facet medial/lateral1269 (99)/1280 (100)14 (1)/4 (0)1 (0)/0 (0)0 (0)/0 (0)
 Trochlear facet medial/lateral1274 (99)/1274 (99)9 (1)/8 (1)1 (0)/2 (0)0 (0)/0 (0)
Menisci:
 Subluxation medial/lateral1092 (85)/1112 (87)171 (13)/156 (12)19 (1)/16 (1)2 (0)/0 (0)
 Maceration medial/lateral837 (65)/955 (74)341 (27)/262 (20)102 (8)/63 (5)4 (0)/4 (0)
 Tear medial/lateral985 (77)/1090 (85)299 (23)/194 (15)NANA
  • Numbers (%, rounded to whole numbers).

  • NA, not applicable; NEO, the Netherlands Epidemiology of Obesity study.