Table 2

Proportionate injury analyses based on costs for medical care or paid lost time among teens (age 15–19) in the North Carolina homebuilding industry, 1996–99

Associated costsNo (%) observed injuriesPIR* (95% CI)
*Proportionate injury ratio (PIR) = 1 indicates observed proportion of injuries = to expected based on injury experience of adults in same trade group. Example: PIR = 1.3 represents 30% more than expected; PIR = 0.6 represents 40% less than expected.
†Statistically significant (p<0.05).
CI = confidence interval.
A. Medical costs
    No medical costs65 (18.7)1.1 (0.87 to 1.4)
    < $500205 (59.1)1.2† (1.03 to 1.4)
    $500–99927 (7.8)0.79 (0.50 to 1.1)
    $1000–499927 (7.8)0.61† (0.40 to 0.86)
    $5000 and more23 (6.6)0.62† (0.39 to 0.90)
B. Paid lost time
    No paid lost time costs294 (84.7)1.1 (0.99 to 1.3)
    < $50019 (5.5)1.3 (0.79 to 2.0)
    $500–9998 (2.3)1.1 (0.45 to 1.9)
    $1000–499918 (5.2)0.61† (0.36 to 0.93)
    $5000 and more8 (2.3)0.24† (0.10 to 0.44)