Comparison of one-level microendoscopy laminoforaminotomy and cervical arthroplasty in cervical spondylotic radiculopathy: a minimum 2-year follow-up study

Table 3 Follow-up parameters (mean ± standard deviation, CA vs. MELF)

	Pre-op	1.5 months	3.0 months	6.0 months	12.0 months	24.0 months
NDI
CA	46.1 ± 7.1*	29.0 ± 5.5	23.1 ± 4.1	22.0 ± 3.5	21.3 ± 3.6	11.1 ± 2.5
MELF	45.1 ± 8.1*	31.0 ± 5.7	20.3 ± 4.1	20.1 ± 4.5	18.1 ± 3.1	10.2 ± 3.5
Neck pain VAS
CA	70.4 ± 8.4*	31.6 ± 11.6	25.4 ± 7.2	23.6 ± 7.6	20.0 ± 6.5	18.1 ± 6.1
MELF	68.6 ± 10.4*	29.6 ± 7.6	24.4 ± 6.8	23.0 ± 7.4	21.1 ± 6.9	16.7 ± 6.4
Arm pain VAS
CA	72.2 ± 7.4*	18.0 ± 5.2	19.1 ± 6.1	20.0 ± 4.5	18.1 ± 3.6	12.1 ± 2.7
MELF	71.3 ± 7.6*	18.0 ± 4.6	17.2 ± 5.8	16.4 ± 3.8	15.2 ± 3.4	12.2 ± 2.2
SF-36 PCS
CA	33.3 ± 3.6*	40.0 ± 3.8	47.3 ± 4.6	48.1 ± 4.9	49.3 ± 5.6	52.2 ± 5.4
MELF	35.1 ± 4.6*	38.8 ± 4.4	44.7 ± 4.9	50.0 ± 5.5	49.1 ± 5.1	51.5 ± 5.2
SF-36 MCS
CA	46.2 ± 3.6*	53.0 ± 4.4	55.1 ± 4.6	54.0 ± 5.4	55.3 ± 5.6	54.1 ± 5.3
MELF	47.1 ± 3.9*	55.3 ± 3.1	53.3 ± 4.3	53.4 ± 5.3	54.2 ± 5.3	54.3 ± 5.1

*P < 0.01 in Student t test indicates statistically significant difference compared with any other time point in the same group, based on the NDI score for functional disability and neurogenic symptoms, VAS for neck and arm pain, and SF-36 score for PCS and MCS. No significant difference was observed between MELF and CA at 1.5, 3, and 6 months, and at 1- and 2-year follow-ups (P > 0.05 in Student t test).

ISSN: 1749-799X