Table 1. Systolic and diastolic blood pressure at baseline and after six months in five groups stratified by initial systolic blood pressure.

	n	Age (years)	Systolic blood pressure (mmHg)				Diastolic blood pressure (mmHg)
			Baseline	Six months	p	Δ	Baseline	Six months	p	Δ
Group 1 (>160 mmHg)	27	66.2 ± 8.8	164.7 ± 7.5	143.3 ± 8.5	***	−21.3 ± 9.4	88.4 ± 9.9	81.1 ± 4.9	**	−7.3 ± 8.3
Group 2 (150–159 mmHg)	35	67.4 ± 5.6	152.1 ± 2.9	140.3 ± 6.4	**	−11.8 ± 6.9	81.9 ± 8.5	79.0 ± 6.6	**	−2.9 ± 7.3
Group 3 (140–149 mmHg)	70	64.3 ± 8.5	141.9 ± 2.5	134.4 ± 6.4	***	−7.5 ± 6.2	78.5 ± 8.8	76.6 ± 5.2	*	−1.9 ± 7.7
Group 4 (130–139 mmHg)	89	61.2 ± 8.1	131.9 ± 2.5	126.6 ± 5.0	***	−5.3 ± 5.4	76.7 ± 7.8	74.5 ± 6.4	**	−2.2 ± 8.7
Group 5 (120–129 mmHg)	75	59.3 ± 9.7	122.7 ± 2.9	120.1 ± 4.3	***	−2.6 ± 4.3	75.1 ± 6.5	72.7 ± 5.7	**	−2.4 ± 5.8

Notes.

^*P < 0.05.

^**P < 0.001.

^***P < 0.0001.