The association between shift work and hyperuricemia in steelmaking male workers

Table 2 Characteristics of study subjects by shift work

		Daytime work		Shift work		p-value
		(n = 276)		(n = 753)
		n	%	n	%
Age (years)		46.3		40.2		<0.001^†
BMI (kg/m²)		24.6		24.8		0.302^†
Work duration (years)		20.1		13.9		<0.001^†
Hyperuricemia (≥7 mg/dl)
	Yes	72	26.1	282	37.5	<0.001 ^*
	No	204	73.9	471	62.5
Hypertension
	Yes	62	22.5	85	11.3	<0.001 ^*
	No	214	77.5	668	88.7
Diabetes mellitus
	Yes	27	9.8	56	7.4	0.221^*
	No	249	90.2	697	92.6
Hyperlipidemia
	Yes	93	33.7	198	26.3	0.020 ^*
	No	183	66.3	555	73.7
Liver enzyme abnormality
	Yes	60	21.7	158	21.0	0.792^*
	No	216	78.3	595	79.0
Impaired renal function^‡
	Yes	144	52.2	290	38.5	<0.001 ^*
	No	132	47.8	463	61.5
Smoking
	Never-smoker or ex-smoker	153	55.4	403	53.5	0.585^*
	Current smoker	123	44.6	350	46.5
Sufficient physical activity
	Yes^§	100	36.2	224	29.7	0.047 ^*
	No	176	63.8	529	70.3
Consumption of alcohol
	Moderate drinker	181	65.6	516	68.5	0.370^*
	High drinker^¶	95	34.4	237	31.5

*Calculated by chi-square test.
^†Calculated by t-test.
^‡EGFR <90 mL/min/1.73 m².
^§Vigorous-intensity physical activity more than three times per week or moderate-intensity physical activity more than five times per week.
^¶drink alcohol more than two times per week and seven glasses per time.

ISSN: 2052-4374