Center Volumes Correlate with Likelihood of Stent Implantation in German Coronary Angiography

Table 1

Baseline characteristics per center category in 2017.

	Total	≤100	101–200	201–300	301–400	401–500	501–600	601–700	701–800	801–900	901–1000	>1000
Number of patients	528,188	11,049	24,567	46,352	57,755	49,952	60,282	48,986	40,061	37,860	40,090	111,234
Number of centers	828	281	75	90	89	63	63	43	31	25	24	44
Logistic EuroSCORE	8.43	9.28	8.71	8.43	8.53	8.38	8.61	8.46	8.26	8.09	8.68	8.22
Age in years	69.79	70.74	70.03	69.90	69.79	69.60	69.82	69.93	69.69	69.30	69.75	69.83
Female	29.27%	31.25%	31.62%	30.22%	30.19%	28.90%	29.77%	28.43%	29.58%	27.54%	29.32%	28.40%
1‐vessel CAD	26.57%	31.95%	30.30%	28.53%	28.45%	27.35%	26.21%	26.22%	25.62%	25.95%	25.93%	24.22%
2‐vessel CAD	28.33%	28.20%	28.76%	29.31%	28.58%	29.39%	28.65%	28.71%	28.29%	28.57%	27.84%	27.00%
3‐vessel CAD	45.39%	39.52%	40.81%	42.07%	43.17%	43.55%	45.27%	45.66%	46.34%	46.01%	47.23%	49.08%
Left main stenosis	7.42%	5.33%	6.28%	5.67%	6.53%	6.30%	6.73%	8.45%	6.70%	7.71%	8.71%	9.18%
Stable AP	1.10%	1.82%	1.44%	1.96%	1.32%	1.43%	1.35%	0.52%	1.09%	0.95%	0.66%	0.65%
Unstable AP	13.03%	17.68%	16.45%	14.34%	13.70%	14.56%	13.79%	12.26%	12.80%	12.06%	11.11%	11.28%
NSTEMI	20.14%	23.60%	23.52%	21.93%	22.93%	22.05%	22.13%	19.43%	18.20%	19.29%	19.26%	16.52%
STEMI	11.20%	5.50%	10.50%	11.21%	12.69%	13.19%	11.69%	11.38%	10.80%	11.72%	10.45%	10.14%
In‐stent stenosis	4.43%	1.70%	2.65%	3.16%	3.11%	3.57%	3.74%	4.77%	4.21%	4.76%	5.76%	6.42%
Emergency admission	50.12%	53.91%	56.64%	52.46%	54.02%	53.64%	54.28%	49.60%	48.10%	46.02%	47.75%	44.69%

AP: angina pectoris; CAD: coronary artery disease; EuroSCORE: European system for cardiac operative risk evaluation; NSTEMI: non-ST-segment elevation myocardial infarction; STEMI: ST-segment elevation myocardial infarction.