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Table 1 Clinical characteristics of all the subjects and the two subgroups: normal IMT group and abnormal IMT group

From: Relationship of short-term blood pressure variability with carotid intima-media thickness in hypertensive patients

Characteristics All subjects (N = 78) IMT <1.0 mm (N = 43) IMT ≥1.0 (N = 35) T(x2)值 P value
Age (years) 55.9 ± 13.0 51.7 ± 12.9 61.1 ± 11.4 −3.374 0.001**
Male gender (%) 57.7 55.8 60 −0.368 0.714
Smoking (%) 23.1 14 34.3 −2.088 0.041*
IMT ≥1.0 mm 44.9 0 100 −9.950 0.000**
Presence of plaque (%) 51.3 30.2 77.1 −4.601 0.000**
CCA IMT (mm) 1.0 ± 0.2 0.78 ± 0.12 1.16 ± 0.11 −14.474 0.000**
Bulb IMT (mm) 0.8 ± 0.3 0.67 ± 0.14 1.00 ± 0.26 −6.754 0.000**
ICA IMT (mm) 0.6 ± 0.1 0.52 ± 0.08 0.66 ± 0.13 −5.630 0.000**
24 h SBP (mmHg) 125.1 ± 15.4 124.5 ± 13.4 125.9 ± 17.7 −0.394 0.695
24 h DBP (mmHg) 81.5 ± 12.8 82.7 ± 11.8 80.0 ± 14.0 0.928 0.356
24 h PP (mmHg) 43.6 ± 8.6 41.8 ± 6.4 45.9 ± 10.5 −2.030 0.047*
Daytime SBP (mmHg) 126.2 ± 15.3 125.5 ± 13.2 127.0 ± 17.7 −0.430 0.669
Daytime DBP (mmHg) 84.3 ± 15.8 84.8 ± 12.9 83.7 ± 18.9 0.284 0.777
Daytime PP (mmHg) 41.9 ± 11.3 40.7 ± 8.4 43.4 ± 14.1 −0.973 0.335
Nighttime SBP (mmHg) 121.0 ± 17.6 120.4 ± 16.0 121.6 ± 19.6 −0.298 0.767
Nighttime DBP (mmHg) 77.6 ± 13.7 78.3 ± 12.8 76.8 ± 14.9 0.484 0.630
Nighttime PP (mmHg) 43.3 ± 10.0 42.1 ± 7.8 44.8 ± 12.2 −1.109 0.272
SBP decrease (%) 2.3 ± 6.8 2.7 ± 5.2 1.9 ± 8.2 0.371 0.713
DBP decrease (%) 4.1 ± 7.2 4.2 ± 5.4 4.0 ± 8.6 0.102 0.919