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Table 2 Cross-sectional areas of LDH, dural sac area, and disc height measured over two time-points (Time 2–3), presented as means with 95 % confidence intervals, for disc levels L3-L4, L4-L5, and L5-S1

From: Progression of lumbar disc herniations over an eight-year period in a group of adult Danes from the general population – a longitudinal MRI study using quantitative measures

Level & Time Disc levels (n) Mean size [95 % Confidence Intervals] (mm2)
LDH Dural Sac Intervertebral Height
L3-L4     
 Time 2 9 123 [98; 148] 252 [214; 290] 392 [337; 448]
 Time 3 9 119 [94; 144] 249 [202; 295] 377 [316; 439]
L4-L5     
 Time 2 23 151 [139; 162] 202 [172; 232] 431 [392; 470]
 Time 3 23 147 [135; 159] 202 [170; 234] 425 [391; 459]
L5-S1     
 Time 2 28 163 [148; 177] 338 [309; 368] 427 [396; 457]
 Time 3 28 159 [145; 173] 336 [306; 365] 425 [395; 455]