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=1475) | MarketScan (n=14 750) | p Value* | |
|---|---|---|---|
| n (%) | n (%) | ||
| None† | 801 (54.3) | 10 142(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 the 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 the low back, neck and/or knee.