Table 3.

Association of SD of SBP with risk of cardiovascular event, based on number of blood pressure measurement (n=1403)

Number of measurement	Mean SD of SBP, mm Hg	Adjusted OR (95% CI)*	P value	Number of patients
8	12.8±4.7	1.00 (0.96 to 1.05)	0.88	1403
12	13.1±4.2	1.01 (0.96 to 1.06)	0.76	1396
16	13.3±4.0	1.02 (0.96 to 1.08)	0.50	1381
20	13.5±3.8	1.07 (1.02 to 1.13)	0.009	1344
24	13.6±3.6	1.09 (1.03 to 1.15)	0.002	1249
28	13.7±3.5	1.09 (1.02 to 1.16)	0.008	1096
32	13.9±3.3	1.11 (1.04 to 1.19)	0.003	853
36	14.3±3.3	1.10 (1.00 to 1.19)	0.04	483
40	14.5±3.2	1.04 (0.67 to 1.61)	0.88	65

*Adjusted for age, sex, race, presence of diabetes mellitus, on antihypertensive treatment, HbA1c, total cholesterol, LDL cholesterol, smoking, chronic kidney disease and mean SBP.

HbA1c, haemoglobin A1c; LDL, low-density lipoprotein; SBP, systolic blood pressure.