Table 5

Stepwise regression analyses for slopes of blood pressure during five years of follow up in 847 hypertension free Japanese male office workers

Variables	Regression coefficient	Standard error	Standardised regression coefficient	t value	p value	Cumulative r²
Slope of systolic blood pressure (mm Hg/year)
Systolic blood pressure (mm Hg)	−0.083	0.007	−0.389	−12.16	<0.001	0.133
Alcohol intake (g/day of ethanol)	0.012	0.003	0.133	4.18	<0.001	0.151
Working hours (h/day)	−0.085	0.038	−0.074	−2.25	0.025	0.159
Slope of body mass index (kg/m²/year)	0.972	0.333	0.093	2.92	0.004	0.166
Age (y)	0.033	0.014	0.078	2.40	0.017	0.171
Slope of diastolic blood pressure (mm Hg/year)
Diastolic blood pressure (mm Hg)	−0.085	0.006	−0.413	−13.18	<0.001	0.162
Slope of body mass index (kg/m²/year)	0.995	0.251	0.123	3.96	<0.001	0.174
Working hours (h/day)	−0.079	0.028	−0.089	−2.82	0.005	0.185
Occupation: architect/research worker	−0.249	0.119	−0.070	−2.10	0.026	0.190
Alcohol intake (g/day of ethanol)	0.005	0.002	0.068	2.16	0.031	0.195
Slope of mean arterial blood pressure (mm Hg/year)
Mean arterial blood pressure (mm Hg)	−0.074	0.007	−0.359	−11.13	<0.001	0.116
Slope of body mass index (kg/m²/year)	0.979	0.253	0.123	3.86	<0.001	0.129
Working hours (h/day)	−0.081	0.028	−0.093	−2.88	0.004	0.140
Alcohol intake (g/day of ethanol)	0.007	0.002	0.098	3.03	0.003	0.150
Occupation: architect/research worker	−0.251	0.113	−0.072	−2.23	0.026	0.155

Percentage of variation accounted for =r ² × 100.r: multiple correlation. Variables included in the multiple regression analyses were age, occupation, position, working hours, body mass index, alcohol intake, cigarette smoking, eating breakfast, vegetable consumption, fruit consumption, regular physical exercise, salt intake, hours of sleep, and hours of commutation at baseline and slope of body mass index.