Table 1 Baseline characteristics of study participants*

From: Comparative Effectiveness of Di'ao Xin Xue Kang Capsule and Compound Danshen Tablet in Patients With Symptomatic Chronic Stable Angina

Characteristics

XXK group (N = 366)

CDS group (N = 367)

P value

Sex — no. (%)

  

0.6696

Male

113(30.87)

108(29.43)

 

Female

253(69.13)

259(70.57)

 

Age (yr)

58.05 ± 7.75

58.22 ± 7.36

0.7597

Prior treatment for angina—No. (%)

  

0.3004

Yes

183(50.00)

197(53.68)

 

No

183(50.00)

170(46.32)

 

Concomitant disease—No. (%)†

  

0.5979

Yes

81(22.13)

87(23.71)

 

No

285(77.87)

280(76.29)

 

Mean pulse rate (bpm) £

70.20 ± 8.65

71.62 ± 8.77

0.0285‡

Systolic pressure (mmHg)

124.34 ± 8.77

125.56 ± 8.65

0.0573

Diastolic pressure (mmHg)

76.64 ± 6.39

77.05 ± 6.86

0.3969

Weekly angina frequency

6.95 ± 3.99

6.94 ± 3.78

0.9549

CCS angina class—No. (%) §

  

0.8659

I

104(28.42)

102(27.79)

 

II

247(67.49)

250(68.12)

 

III

15(4.10)

15(4.09)

 

Weekly nitroglycerin use

1.81 ± 3.08

1.75 ± 2.9

0.9816

SAQ score §

   

Angina frequency

54.62 ± 19.70

54.39 ± 19.09

0.8722

Physical limitation

68.90 ± 16.35

69.80 ± 16.52

0.4579

Angina stability

41.67 ± 18.47

42.78 ± 17.60

0.4041

Treatment satisfaction

49.47 ± 17.57

49.91 ± 16.71

0.7252

Quality of life

40.57 ± 17.41

41.42 ± 16.73

0.5040

Xueyu Zheng score §

7.09(1.79)

7.06(1.77)

0.8184

ECG—No. (%)

  

1.0000

Normal

2(0.55)

2(0.55)

 

Abnormal

362(99.45)

364(99.45)

 

Exercise Tolerance Testing ¤

   

Time to onset of ST segment depression(s)

292.21 ± 279.53

242.03 ± 230.97

0.1365

Time to onset of angina(s) ∮

604.50 ± 351.01

434.22 ± 322.79

0.0560

Maximum ST segment depression(mv)

0.19 ± 0.16

0.22 ± 0.33

0.3919

  1. *Plus–minus values are means ± SD unless otherwise noted.
  2. †The “concomitant disease” mainly included diabetes mellitus, hypertension or hyperlipidemia.
  3. £Data were missing for one patient in the XXK group and three patients in the CDS group.
  4. ‡The mean heart rate in the XXK group was lower than that in the CDS group, P < 0.05.
  5. §“CCS” referred to Canadian Cardiovascular Society. “SAQ” referred to Seattle Angina Questionnaire.
  6. ¶“ECG” referred to electrocardiogram and the data were missing for two patients in the XXK group and one patient in the CDS group.
  7. ¤Exercise Tolerance Testing (ETT) was administrated in 111 and110 patients in the XXK and CDS groups, respectively.
  8. ∮During the exercise testing, 34 and 27 patients experienced an onset of angina in the XXK and CDS groups, respectively.
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