Table 4.
Proportion of members with claims for one or more body regions of the low back, neck, and/or knee between work groups during the period 2006-2010
| Floor layers (n=1,475) n (%) | MarketScan (n=14,750) n (%) | p-value* | |
|---|---|---|---|
| None** | 801 (54.3) | 10142 (68.8) | <0.001 |
| Low Back | 217 (14.7) | 2043 (13.9) | 0.363 |
| Neck | 61 (4.1) | 681 (4.6) | 0.399 |
| Knee | 65 (4.4) | 465 (3.2) | 0.001 |
| Multiple*** | 331 (22.4) | 1419 (9.6) | <0.001 |
*
using z-ratio test for two independent proportions
**
Members with no claims for the low back, neck, or knee
***
Claims for more than one of three body regions, including low back, neck, and/or knee