Two-level Neck Disability Index (NDI)

Success Criteria

NDI is measured using a subject answered questionnaire, which assesses the effect of pain on daily life. Each of the 10 assessed criteria§ receives a score from 0 to 5; the highest score (50 points) represents the most disabled. The final score can be converted to a percentage.

If baseline NDI: NDI score improvement at 60 months must be:
≥ 30 points out of 50 points ≥ 15 points out of 50 points
< 30 points out of 50 points ≥ 50% improvement

Results

Two-level NDI Success

Mobi-C
Fusion
 

* p = 0.0042
** p < 0.0001
† Fisher Exact test used to compare treatments.

Two-level Mean NDI Over Time

Mobi-C
Fusion
 

§Note: NDI assessed criteria includes: pain intensity, personal care, lifting, reading, headaches, concentration, work, driving, sleeping, and recreation.

One-level Neck Disability Index (NDI)

Success Criteria

NDI is measured using a subject answered questionnaire, which assesses the effect of pain on daily life. Each of the 10 assessed criteria§ receives a score from 0 to 5; the highest score (50 points) represents the most disabled. The final score can be converted to a percentage.

If baseline NDI: NDI score improvement at 60 months must be:
≥ 30 points out of 50 points ≥ 15 points out of 50 points
< 30 points out of 50 points ≥ 50% improvement

Results

One-level NDI Success

Mobi-C
Fusion
 

One-level Mean NDI Over Time

Mobi-C
Fusion
 

§ Note: NDI assessed criteria includes: pain intensity, personal care, lifting, reading, headaches, concentration, work, driving, sleeping, and recreation.