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. Author manuscript; available in PMC: 2015 Sep 12.
Published in final edited form as: J Occup Environ Hyg. 2009 Oct;6(10):639–647. doi: 10.1080/15459620903139060

TABLE II.

Activity Card: Day 1 and Week 2 Outcomes

Activity Card
Mean (SD) percent of minutes report wearing HPD
All Subjects
Construction
Fixed–Variable
Fixed–Steady
p-ValueA
n % n % n % n %
Day 1
 All shifts 58 36 (±44) 19 23 (±39) 20 78 (±32) 19 5 (±22) <0.0001
 Minutes with 1 min Leq >85 dBA 58 38 (±46) 19 24 (±40) 20 82 (±34) 19 5 (±22) <0.0001
Week 2
 All shifts 206 37 (±44) 67 30 (±39) 65 78 (±33) 74 8 (±25) <0.0001
 Minutes with 1 min Leq >85 dBA 206 38 (±46) 67 30 (±40) 65 82 (±33) 74 8 (±25) <0.0001

Note: n = number of shifts subjects reported wearing HPDs, all shifts and in high noise.

A

One-way ANOVA.