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. 2021 Dec 15;8:760265. doi: 10.3389/fmed.2021.760265

Table 2.

Sociodemographic and medical characteristics of the patient sample.

Total Age group 40–59 years Age group 60–79 years Age group 80–96 years Age group comparison
p χ2
n 750 83 400 242
Age 73.3 ± 10.3 54.63 ± 3.9 70.6 ± 5.5 84.1 ± 3.4
Sex 32.8%♀ 22.4%♀ 28.0%♀ 44.1%♀ <0.001 20.49
Occupation <0.001 309.72
 Working 14.2% 78.3% 9.0% 0.4%
 Unemployed 2.6% 13.3% 2.0% 0.0%
 Retired 83.3% 8.4% 89.0% 99.6%
Education 0.005 14.48
 Primary 3.5% 1.2% 3.1% 4.3%
 Secondary 78.1% 89.2% 80.6% 70.7%
 Tertiary 18.4% 9.6% 16.4% 25.0%
Area <0.001 24.00
 City 23.8% 16.5% 19.5% 32.2%
 Small town 26.8% 17.7% 28.7% 28.3%
 Rural 49.4% 65.8% 51.8% 39.6%
Living alone 22.0% 18.1% 17.0% 31.4% <0.001 19.09
Care level 16.5% 6.5% 9.8% 30.3% <0.001 47.14
CAD symptoms (CCSA) 0.158 9.30
 Grade I 58.6% 57.7% 61.1% 54.3%
 Grade II 12.6% 11.5% 12.8% 12.6%
 Grade III 17.1% 15.4% 13.9% 22.9%
 Grade IV 11.7% 15.4% 12.3% 10.3%
CAD risk stratification 0.330 2.22
 Low risk 92.4% 88.5% 93.1% 93.3%
 High risk 7.6% 11.5% 6.9% 6.7%
COVID-19 infection 0.8% 1.2% 1.3% 0.0% 0.163 3.32
Other chronic diseases
 Asthma 6.1% 4.8% 7.0% 5.4% 0.714 0.81
 Breast cancer 3.3% 1.2% 3.0% 4.5% 0.387 2.08
 COPD 7.7% 2.4% 9.5% 6.2% 0.052 5.91
 Type 1 DM 2.1% 3.6% 2.3% 1.7% 0.536 1.34
 Type 2 DM 27.4% 9.6% 29.3% 29.0% 0.001 14.25

Data are presented as mean, standard deviations, and percentage (n/nvalid). Age was not available for 25 patients. CAD, coronary artery disease; CCSA, Canadian Cardiovascular Society Angina Classification; COPD, Chronic obstructive pulmonary disease; DM, Diabetes mellitus. The bold p-values highlight a significant result.