Group Before propensity score matching Before propensity score matching Before propensity score matching Before propensity score matching Before propensity score matching After propensity score matching After propensity score matching After propensity score matching After propensity score matching After propensity score matching
Interventional cardiologists Interventional cardiologists Non-interventional cardiologists Non-interventional cardiologists P value Interventional cardiologists Interventional cardiologists Non-interventional cardiologists Non-interventional cardiologists P value
Sample size N=642 N=642 N=402 N=402 N=198 N=198 N=198 N=198
Variables Mean/% SD Mean/% SD Mean/% SD Mean/% SD
Demographics
Male (n, %) a 75.9% 49.3% <0.001 59.6% 60.1% 1.000
Age (years)a 39.9 6.7 37.8 8.1 <0.001 37.9 6.7 38.2 7.3 0.877
Obesity (BMI≥28.0) 5.9% 1.5% 0.001 4.0% 2.0% 0.289
Overweight (24.0≤BMI<28.0) 35.4% 15.9% <0.001 19.7% 18.2% 0.700
Normal weight (18.5≤BMI<24.0)a 54.4% 68.2% <0.001 72.2% 73.2% 0.855
Underweight (BMI<18.5) 4.4% 14.4% <0.001 4.0% 6.6% 0.359
Smoking history (n, %)
Never smoking 84.3% 89.1% 0.030 86.9% 83.8% 0.429
Ever smoked 8.1% 7.7% 0.821 9.1% 12.1% 0.405
Current smoking 7.6% 3.2% 0.003 4.0% 4.0% 1.000
Years of smokinga 1.0 4.0 0.4 2.4 0.003 0.4 2.3 0.5 2.8 0.706
Average number of cigarettes smoked per day 0.7 3.1 0.3 2.1 0.725 0.4 2.7 0.5 2.6 0.637
Drinking history (n, %)
Never drinking 17.8% 46.3% <0.001 29.3% 27.8% 0.677
Occasional social drinkinga 81.2% 53.5% <0.001 70.2% 72.2% 0.540
Regular drinking 1.1% 0.2% 0.129 0.5% 0.0% 1.000
Education degree (n, %)
Bachelor’s degree or below 22.6% 19.4% 0.222 17.2% 22.2% 0.245
Master’s degree 51.7% 68.4% <0.001 68.2% 63.1% 0.275
Doctoratea 25.7% 12.2% <0.001 14.6% 14.6% 1.000
Profession title (n, %)
Attending physiciana 44.2% 55.0% 0.001 62.6% 61.1% 0.719
Associate chief physician 37.1% 39.3% 0.470 28.8% 32.8% 0.230
Chief physiciana 18.7% 5.7% <0.001 8.6% 6.1% 0.228
Years of working in the department of cardiology 13.0 7.2 10.6 7.8 <0.001 11.1 7.2 11.0 6.8 0.637