Occupational noise exposure and the prevalence of dyslipidemia in a cross-sectional study

BMC Public Health

Table 1 Demographic Characteristics of Employees by Workplace Noise Exposure

Variables	Noise-exposed group			control group			P value^a
Variables	No.	%	M (QL, QU)	No.	%	M (QL, QU)	P value^a
Age			35(29, 39)			34(30, 39)	0.300
< 30	136	27.64		160	24.10
30–39	251	51.02		376	56.63
40–49	67	13.62		80	12.05
50–59	38	7.72		48	7.23
Sex							< 0.001
Male	461	93.70		471	70.93
Female	31	6.30		193	29.07
Heart Rate			77(71, 85)			79(72, 86)	0.259
< 60	12	2.44		8	1.20
60–100	466	94.72		634	95.48
> 100	14	2.85		22	3.31
BMI			25.29(22.66, 27.96)			23.73(21.22, 26.20)	< 0.001
< 18.5	12	2.44		28	4.22
18.5–23.9	161	32.72		325	48.95
24–27.9	200	40.65		242	36.45
≥ 28	119	24.19		69	10.39
ECG							0.254
Normal	362	73.58		508	76.51
Abnormal	130	26.42		156	23.49
PTA							< 0.001
Normal	465	94.51		664	100.00
Abnormal	27	5.49		0	0.00
Hypertension							< 0.001
Yes	210	42.68		188	28.31
No	282	57.32		476	71.69
Fatty liver							< 0.001
Yes	279	56.71		243	36.60
No	213	43.29		421	63.40
Diabetes							0.008
Yes	22	4.47		12	1.81
No	470	95.53		652	98.19
Noise exposure years (years)	13 (8, 19)
Noise intensity (dB(A))	78.90(78.10, 82.10)

Abbreviations: BMI body mass index, ECG electrocardiogram, PTA pure-tone audiometry
^a χ² test for the difference (P < 0.05) between the 2 groups

ISSN: 1471-2458