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Table 1 Baseline clinical characteristics of study population

From: Combined effect of hyperhomocysteinemia and smoking on the severity of coronary artery disease in young adults ≤ 35 years of age: a hospital-based observational study

Characteristics

Total (n = 989)

HHcy−Smoker− (n = 153)

HHcy+Smoker− (n = 160)

HHcy−Smoker+(n = 289)

HHcy+Smoker+(n = 387)

Age (years)

33 (30–34)

33 (30–34)

32 (29–34)

33 (31–34)

32 (30–34)

Male, n (%)

951 (96.16)

128 (83.66)

151 (94.38)a

288 (99.65)ab

384 (99.22)ab

SBP (mmHg)

126.44 ± 15.61

126.87 ± 14.97

127.44 ± 14.94

127.36 ± 16.71

125.18 ± 15.25

DBP (mmHg)

78.01 ± 13.19

78.21 ± 14.18

78.43 ± 14.13

78.25 ± 13.71

77.57 ± 11.97

Heart rate (bpm)

75.94 ± 11.71

75.34 ± 10.17

77.25 ± 11.36

76.21 ± 12.14

75.43 ± 12.07

Drinker, n (%)

182 (18.40)

14 (9.15)

9 (5.63)

80 (27.68)ab

79 (20.41)ab

Medical history and coronary risk factors

     

BMI (kg/m2)

28.34 ± 5.01

27.68 ± 6.15

28.09 ± 4.57

28.72 ± 5.08

28.44 ± 4.57

Hypertension, n (%)

485 (49.04)

74 (48.37)

77 (48.13)

149 (51.56)

185 (47.80)

Diabetes mellitus, n (%)

191 (19.31)

36 (23.53)

25 (15.63)

82 (28.37)b

48 (12.40)ac

Hypertriglyceridemia, n (%)

559 (56.52)

65 (42.48)

82 (51.25)

178 (61.59)a

234 (60.47)a

Hypercholesterolemia, n (%)

336 (33.97)

51 (33.33)

45 (28.13)

114 (39.45)

126 (32.56)

High LDL-C, n (%)

307 (31.04)

37 (24.18)

42 (26.25)

104 (35.99)

124 (32.04)

Low HDL-C, n (%)

677 (68.45)

96 (62.75)

106 (66.25)

200 (69.20)

275 (71.06)

Family history of CAD, n (%)

127 (12.84)

13 (8.50)

8 (5.00)

42 (14.53)b

64 (16.54)b

Hyperuricemia, n (%)

437 (44.19)

61 (39.87)

71 (44.38)

119 (41.18)

186 (48.06)

Prior stroke, n (%)

5 (0.51)

0 (0.00)

0 (0.00)

3 (1.00)

2 (0.50)

Laboratory results

     

BUN (mmol/L)

4.73 ± 1.31

4.67 ± 1.46

4.77 ± 1.31

4.66 ± 1.17

4.79 ± 1.31

CR (µmol/L)

74.78 ± 15.12

72.21 ± 14.81

77.64 ± 19.96a

72.58 ± 12.39b

76.24 ± 14.39ac

HbA1c (%)

5.6 (5.3–6.2)

5.6 (5.2–6.7)

5.5 (5.2–6.1)

5.7 (5.4–6.8)b

5.5 (5.2–5.9)c

TG (mmol/L)

1.88 (1.30–2.85)

1.47 (1.01–2.25)

1.75 (1.15–2.32)

2.05 (1.39–3.36)ab

2.02 (1.43–2.93)ab

TC (mmol/L)

4.74 ± 1.73

4.64 ± 2.10

4.66 ± 2.01

4.92 ± 1.67

4.69 ± 1.46

HDL-C (mmol/L)

0.92 ± 0.25

0.95 ± 0.23

0.93 ± 0.21

0.92 ± 0.35

0.90 ± 0.19

LDL-C (mmol/L)

3.03 ± 1.56

2.95 ± 1.97

3.01 ± 1.91

3.13 ± 1.49

2.99 ± 1.23

UA (µmol/L)

411.23 ± 97.88

390.73 ± 101.55

417.69 ± 107.07a

405.44 ± 83.03

420.99 ± 101.54a

Hcy (µmol/L)

15.60 (11.30–26.60)

10.30 (8.70–12.20)

22.95 (16.53–33.38)a

11.00 (9.00–13.10)ab

25.80 (17.80–39.40)abc

hs-CRP (mg/L)

2.70 (0.97–8.93)

1.37 (0.54–4.85)

2.55 (0.97–6.10)a

3.11 (1.27–11.29)ab

3.12 (0.95–12.91)ab

  1. Data are expressed as mean ± standard deviation, medians with interquartile range or number (%)
  2. CAD coronary artery disease, HHcy hyperhomocysteinemia, SBP systolic blood pressure, DBP diastolic blood pressure, BMI body mass index, BUN blood urea nitrogen, CR creatinine, HbA1c glycated hemoglobin, TG triglyceride, TC total cholesterol, HDL-C high-density lipoprotein cholesterol, LDL-C low-density lipoprotein cholesterol, UA uric acid, hs-CRP high-sensitivity C-reactive protein
  3. ap < 0.05 versus HHcy−Smoker−
  4. bp < 0.05 versus HHcy+Smoker−
  5. cp < 0.05 versus HHcy−Smoker+