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Table 1 Cross-sectional areas of LDH, dural sac area, and disc height measured over three time-points (Time 1–3), 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 1

9

132 [102; 162]

228 [187; 268]

357 [313; 401]

 Time 2

9

124 [96; 152]

224 [164; 284]

350 [299; 401]

 Time 3

9

125 [93; 156]

223 [161: 286]

351 [302; 399]

L4-L5

    

 Time 1

28

145 [133; 158]

228 [204; 252]

423 [398; 447]

 Time 2

28

146 [133; 159]

214 [188; 239]

416 [393; 439]

 Time 3

28

140 [126; 155]

223 [195; 252]

399 [369; 429]

L5-S1

    

 Time 1

43

164 [154; 174]

316 [285; 347]

437 [414; 460]

 Time 2

43

166 [155; 177]

309 (276; 341]

436 [411; 461]

 Time 3

43

175 [161; 189]

304 [272; 336]

421 [393; 449]