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. 2018 Apr 27;14(3):303–309. doi: 10.3988/jcn.2018.14.3.303

Table 2. Comparison of surgical findings and outcomes between the mild- and severe-spasm groups.

Variables Mild-spasm (n=327) Severe-spasm (n=309) p
Offending vessel 0.066
 AICA 188 (57.5) 168 (54.4)
 PICA 99 (30.3) 85 (27.5)
 VA 10 (3.1) 10 (3.2)
 AICA+PICA 7 (2.1) 13 (4.2)
 AICA+VA 9 (2.8) 24 (7.8)
 PICA+VA 8 (2.4) 7 (2.3)
 AICA+PICA+VA 5 (1.5) 2 (0.6)
 Artery+vein 1 (0.3) 0 (0)
 Vein 0 (0) 0 (0)
Single/multiple offending vessels 296/31 (90.5/9.5) 263/46 (85.1/14.9) 0.039*
Indentation grade 1.9±0.8 2.4±0.7 <0.001*
Surgical outcome
 Successful/unsuccessful 281/43 (85.9/13.1) 263/46 (85.1/14.9) 0.568
 SMC grade at 6 months after MVD 0.2±0.5 0.4±1.0 0.248
Complications
 Delayed facial palsy 17 (5.2) 32 (10.4) 0.017*
 Hearing loss 7 (2.1) 9 (2.9) 0.617
 Ear effusion 7 (2.1) 6 (1.9) 1.000
 Tinnitus 5 (1.5) 2 (0.6) 0.452
 Surgery-related 4 (1.2) 5 (1.6) 0.746
 Other 10 (3.1) 9 (2.9) 1.000

Data are n (%) or mean±standard-deviation values.

*p<0.05.

AICA: anterior inferior cerebellar artery, MVD: microvascular decompression, PICA: posterior inferior cerebellar artery, VA: vertebral artery.