. 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 III.

Survey: Day 1 and Week 2 Outcomes

Survey How often did you wear HPD in high noise today?	All Subjects (n = 60)		Construction (n = 20)		Fixed–Variable (n = 20)		Fixed–Steady (n = 20)		p-Value^A
Survey How often did you wear HPD in high noise today?	n	%	n	%	n	%	n	%	p-Value^A
Never	23	38	7	35	1	5	15	75	<0.0001
Less than half time	7	12	4	20	1	5	2	10
About half time	4	7	3	15	0	0	1	5
More than half time	6	10	3	15	3	15	0	0
Always	20	33	3	15	15	75	2	10

In the last two weeks?	All Subjects (n = 57)		Construction (n = 19)		Fixed–Variable (n = 18)		Fixed–Steady (n = 20)		p-Value^A
In the last two weeks?	n	%	n	%	n	%	n	%	p-Value^A
Never	21	37	7	35	0	0	14	70	<0.0001
Less than half time	6	11	2	11	2	11	2	10
About half time	8	14	4	21	2	11	2	10
More than half time	3	5	3	16	0	0	0	0
Always	19	33	3	16	14	78	2	10

n = number of positive responses.

Pearson’s chi-square test.