Table 5:
Pain Symptom Comparison by Exposure and Intervention Usage Groups*
| Measure | Exposure / Intervention Usage Groups | All Interventions | Ergonomic Material Handling Only (Anti-fatigue Mats Excluded) | ||||
|---|---|---|---|---|---|---|---|
| N Surveys | Mean | Effect of Intervention** | N Surveys | Mean | Effect of Intervention** | ||
| NASS-Pain Frequency > 0 | 1 | 592 | 58.3% | −46.8% (−100.4%, 6.9%) | 554 | 56.1% | −52.5% (−101.3%, −3.7%) |
| 2 | 172 | 73.3% | 162 | 71.6% | |||
| 3 | 56 | 66.1% | 53 | 66.0% | |||
| 4 | 148 | 79.1% | 146 | 78.8% | |||
| NASS-Neuro Frequency > 0 | 1 | 592 | 40.9% | −9.1% (−90.3%, 72%) | 554 | 39.2% | −14.3% (−94.1%, 65.4%) |
| 2 | 172 | 57.0% | 162 | 54.9% | |||
| 3 | 56 | 48.2% | 53 | 49.1% | |||
| 4 | 148 | 57.4% | 146 | 56.9% | |||
| DASH-Disability Frequency > 0 | 1 | 592 | 52.4% | −31.7% (−92.4%, 29%) | 554 | 51.1% | −17.2% (−93.9%, 59.5%) |
| 2 | 172 | 54.1% | 162 | 54.3% | |||
| 3 | 56 | 55.4% | 53 | 52.8% | |||
| 4 | 148 | 62.2% | 146 | 61.6% | |||
| DASH-Work Frequency > 0 | 1 | 592 | 26.2% | −2.1% (−86.8%, 82.6%) | 554 | 25.1% | −7.1% (−90.1%, 75.9%) |
| 2 | 172 | 31.4% | 162 | 30.3% | |||
| 3 | 56 | 28.6% | 53 | 28.3% | |||
| 4 | 148 | 40.5% | 146 | 40.4% | |||
| Annual Upper Extremity Symptom Frequency > 0 | 1 | 197 | 58.9% | −86.6% (−96.6%, −47.9%) | 183 | 57.9% | −88% (−105.1%, −70.9%) |
| 2 | 57 | 52.6% | 53 | 50.9% | |||
| 3 | 21 | 42.9% | 20 | 40.0% | |||
| 4 | 68 | 79.4% | 67 | 79.1% | |||
| Annual Low Back Symptom Frequency > 0 | 1 | 197 | 34.5% | −59.2% (−89.4%, 57.5%) | 183 | 33.9% | −63.9% (−115.4%, −12.4%) |
| 2 | 57 | 45.6% | 53 | 45.3% | |||
| 3 | 21 | 57.1% | 20 | 55.0% | |||
| 4 | 68 | 58.8% | 67 | 59.7% | |||
| NASS-Pain Severity Scaled | 1 | 592 | 16.1 | −7% (−19.3%, 7.2%) | 554 | 15.8 | −9.8% (−23.2%, 3.6%) |
| 2 | 172 | 17.7 | 162 | 17.4 | |||
| 3 | 56 | 16.7 | 53 | 16.8 | |||
| 4 | 148 | 19.6 | 146 | 19.6 | |||
| NASS-Neuro Severity Scaled | 1 | 592 | 8.3 | 0% (−19.4%, 24.1%) | 554 | 8.2 | −6.3% (−27.1%, 14.6%) |
| 2 | 172 | 9.3 | 162 | 9.1 | |||
| 3 | 56 | 9.2 | 53 | 9.3 | |||
| 4 | 148 | 9.3 | 146 | 9.3 | |||
| DASH-Disability Severity | 1 | 592 | 7.9 | −28.8% (−46.2%, −5.7%) | 554 | 7.5 | −30.1% (−50.1%, −10.1%) |
| 2 | 172 | 8.9 | 162 | 8.6 | |||
| 3 | 56 | 8.2 | 53 | 7.3 | |||
| 4 | 148 | 11.4 | 146 | 11.4 | |||
| DASH-Work Severity | 1 | 592 | 6.5 | −39.9% (−58.8%, −12.1%) | 554 | 6.2 | −44.7% (−66.5%, −22.9%) |
| 2 | 172 | 7.5 | 162 | 7.2 | |||
| 3 | 56 | 7.4 | 53 | 7.6 | |||
| 4 | 148 | 11.8 | 146 | 11.9 | |||
*
One company performing seasonal work was not included.
**
Based on comparing Groups 2 and 4, with 95th percentile confidence intervals shown
• Group 1: Least Exposed
• Group 2: Highly Exposed Intervention User
• Group 3: Highly Exposed Other
• Group 4: Highly Exposed Body User