. Author manuscript; available in PMC: 2015 Jun 23.

Published in final edited form as: J Occup Environ Med. 2014 Mar;56(3):313–318. doi: 10.1097/JOM.0000000000000095

TABLE 2.

Comparison of Mean Pre- and Postshift Blood and Urine Values (Mean ± SD)

	Preshift (n = 60)	Postshift (n = 60)	P^*
Blood
Sodium (corrected)^†	138.01 ± 1.84	138.37 ± 2.44	0.26
Potassium	4.45 ± 0.46	4.28 ± 0.42	0.03
Chloride	108.67 ± 2.04	108.23 ± 2.94	0.21
Bicarbonate	23.03 ± 1.47	23.52 ± 1.88	0.02
BUN	14.47 ± 3.98	16.23 ± 4.31	<0.01
Creatinine	1.06 ± 0.18	1.34 ± 0.32	<0.01
BUN/creatinine ratio	14.04 ± 4.56	12.61 ± 4.09	<0.01
Glucose	110.20 ± 29.80	107.12 ± 21.44	0.43
Osmolality	287.31 ± 3.97	288.48 ± 5.35	0.07
Urine
Specific gravity^‡	1.023 ± 0.01	1.028 ± 0.01	<0.01

Paired t test.

^†

Sodium is corrected for participants with glucose concentrations greater than 200 mg/dL, using the formula: corrected sodium = measured sodium + 0.016 (glucose − 100).

^‡

Data were missing for one participant in the preshift group.

BUN, blood urea nitrogen.