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. Author manuscript; available in PMC: 2011 Nov 1.
Published in final edited form as: Am J Prev Med. 2010 Nov;39(5):468–471. doi: 10.1016/j.amepre.2010.07.008

Table 2.

Associations of heat illness prevention strategies with heat illness among H-2A and non–H-2A farmworkers

Prevention Strategies H-2A workers (n=177)
Non–H-2A workers (n=104)
n (%) Heat Illness n (%)a PR (95% CI)b n (%) Heat Illness n (%)a PR (95% CI)b
Total Population 54 (31) 58 (56)
Change work hours 61 (35) 12 (20) 0.58 (0.33, 1.03) 42 (40) 24 (57) 1.18 (0.84, 1.64)
Change work activities 53 (30) 9 (17) 0.50 (0.26, 0.96) 43 (41) 25 (58) 1.21 (0.87, 1.69)
Drink more water 172 (97) 53 (31) 0.86 (0.14, 5.29) 103 (99) 58 (56)
Rest breaks in shaded areas 130 (73) 37 (29) 0.68 (0.43, 1.10) 97 (93) 54 (56) 1.20 (0.64, 2.26)
Air-conditioned places during breaks or after work 1 (<1) 1 (100) 5 (5) 4 (80) 1.27 (0.61, 2.64)
Change hours or activities 62 (35) 13 (21) 0.63 (0.36, 1.10) 45 (43) 27 (60) 1.28 (0.91, 1.80)
Change hours and activities 52 (29) 8 (15) 0.44 (0.22, 0.89) 40 (39) 22 (55) 1.11 (0.79, 1.55)
a

Row percentages

b

Adjusted for educational attainment, housing type, years in U.S. agriculture

PR: prevalence ratio