Table 1.

Blood pressure by participant characteristics before work.

Variables	N (%)	Systolic Blood Pressure			Diastolic Blood Pressure			Mean Arterial Pressure			Pulse Pressure

		Mean^a	SE^a	p-Value^b	Mean^a	SE^a	p-Value^b	Mean^a	SE^a	p-Value^b	Mean^a	SE^a	p-Value^b
Occupation, n (%)
Office workers	120 (50%)	111.50	1.45	0.14	77.66	1.14	0.26	88.98	1.20	0.19	33.84	0.78	0.33
Truck drivers	120 (50%)	114.55	1.45		79.48	1.14		91.20	1.20		34.91	0.78
Sex
Female	80 (33%)	104.88	1.56	<0.01	73.60	1.30	<0.01	84.09	1.33	<0.01	31.46	0.90	<0.01
Male	160 (67%)	116.76	1.10		80.98	0.92		92.93	0.94		35.80	0.64
Age (Quartile)
Q1 [18–27 years]	60 (25%)	112.14	2.06	0.39	77.70	1.60	0.12	89.16	1.69	0.15	34.38	1.11	0.98
Q2 [28–32 years]	62 (26%)	111.58	2.03		76.47	1.58		88.21	1.66		34.73	1.09
Q3 [33–37 years]	58 (24%)	112.62	2.10		78.65	1.63		90.01	1.71		34.27	1.13
Q4 [38–46 years]	60 (25%)	116.18	2.06		81.75	1.60		93.42	1.69		34.10	1.11
BMI
Under and normal	170 (71%)	109.70	1.08	<0.01	76.06	0.85	<0.01	87.30	0.88	<0.01	33.56	0.64	0.06
Overweight	58 (24%)	119.74	1.85		83.02	1.46		95.27	1.51		36.43	1.10
Obese	12 (5%)	128.06	4.06		91.71	3.21		103.78	3.33		36.39	2.42
Smoking habits
Never smoked	138 (58%)	109.66	1.28	<0.01	76.85	1.04	0.01	87.84	1.07	<0.01	32.83	0.70	<0.01
Former smoker	8 (3%)	124.73	5.32		87.88	4.31		100.15	4.46		36.97	2.90
Current smoker	94 (39%)	116.74	1.55		80.27	1.26		92.45	1.30		36.40	0.84
Regular drinker
Yes	90 (38%)	117.78	1.59	<0.01	81.56	1.28	< 0.01	93.65	1.33	<0.01	36.17	0.88	0.01
No	150 (62%)	110.02	1.24		76.74	0.99		87.88	1.03		33.29	0.68
Examination day of the week
Monday	35 (15%)	112.10	1.64	0.10	79.04	1.37	0.46	90.12	1.34	0.28	33.02	1.19	0.11
Tuesday	31 (13%)	111.60	1.81		76.63	1.50		88.23	1.48		35.07	1.24
Wednesday	29 (12%)	114.91	1.91		78.72	1.59		90.74	1.57		35.67	1.29
Thursday	35 (15%)	110.93	1.83		76.69	1.51		88.18	1.50		33.86	1.21
Friday	36 (15%)	112.02	1.88		79.29	1.55		90.22	1.54		32.13	1.21
Saturday	34 (14%)	113.14	2.01		79.00	1.66		90.56	1.65		34.52	1.31
Sunday	40 (17%)	117.00	1.71		80.28	1.42		92.48	1.40		36.57	1.18
Hypertension^c
Yes	31 (13%)	124.19	1.80	<0.01	90.61	1.41	<0.01	101.15	1.42	<0.01	35.53	1.32	0.33
No	209 (87%)	111.18	0.90		76.78	0.63		88.40	0.69		34.19	0.58

Means and standard errors of blood pressure measured on each of the two examination days were estimated by marginal means and corresponding standard errors from mixed-effects regression models.

p-Values were calculated using mixed-effects regression models.

Hypertension was defined as systolic blood pressure >140 mmHg or diastolic blood pressure >90 mmHg.