Table 3.
Comparison of Numeric Rating Scale (NRS) for pain and Neck Disability Index (NDI) score summaries at 6 time points.
| Time Points | Numeric Pain Rating Score Mean ± SD |
Neck Disability Index Mean ± SD |
||
|---|---|---|---|---|
| Group I (N=60) |
Group II (N=60) |
Group I (N=60) |
Group II (N=60) |
|
| Baseline | 7.9 ± 0.9 | 7.6 ± 0.8 | 30.2 ± 4.7 | 28.6 ± 7.2 |
| 3 months | 3.7* ± 1.4 (73%) |
3.3* ± 1.0 (85%) |
15.5* ± 6.0 (70%) |
13.7* ± 5.4 (78%) |
| 6 months | 3.6* ± 1.4 (78%) |
3.5* ± 1.3 (77%) |
15.0* ± 5.6 (68%) |
14.2* ± 6.1 (73%) |
| 12 months | 3.7* ± 1.3 (80%) |
3.6* ± 1.4 (73%) |
14.6* ± 5.8 (73%) |
14.4* ± 6.5 (68%) |
| 18 months | 3.7* ± 1.4 (75%) |
3.6* ± 1.4 (77%) |
14.2* ± 5.5 (80%) |
13.9* ± 5.9 (73%) |
| 24 months | 3.7* ± 1.6 (75%) |
3.5* ± 1.4 (75%) |
14.1* ± 5.7 (75%) |
13.8* ± 6.5 (70%) |
| Group Difference | 0.346 | 0.129 | ||
| Baseline vs Follow-up Points | 0.001 | 0.001 | ||
| Group by Time Interaction# | 0.348 | 0.303 | ||
Percentages in parenthesis illustrate proportion with significant pain relief (≥ 50%) from baseline.
* indicates significant difference with baseline values (P < 0.01) within the group.
# Group by Time Interaction - There was no significant difference between groups at 3 months, 6 months, 12 months, 18 months and 24 months.