Factors associated with the use of percutaneous coronary intervention in elderly Chinese patients with a first ST elevated acute myocardial infarction

Figures & data

Figure 1 Selection of study patients.

Abbreviations: AMI, acute myocardial infarction; ECG, electrocardiography; RT, rapid reperfusion therapies; STEMI, ST segment elevation myocardial infarction; PCI, percutaneous coronary intervention.

Table 1 Demographic and clinical characteristics of patient by decision to undergo PCI

	Overall (n=568)	PCI (n=432)	No PCI (n=136)	P-value
Age, years
65–74	375 (66.0)	304 (70.4)	71 (52.2)	<0.01
≥75	193 (34.0)	128 (29.6)	65 (47.8)
Sex
Male	367 (64.6)	286 (66.2)	81 (59.6)	0.16
Female	201 (35.4)	146 (33.8)	55 (40.4)
Marital status
Living alone	228 (40.1)	166 (38.4)	62 (45.6)	0.14
Living with spouse/partner	340 (59.9)	266 (61.6)	74 (54.4)
Education, years
0–8	416 (73.2)	322 (74.5)	94 (69.2)	0.21
≥9	152 (26.8)	110 (25.5)	42 (30.8)
Family income (RMB per year)
<50,000	109 (15.2)	88 (20.4)	21 (15.4)	0.24
50,000–100,000	322 (56.7)	246 (56.9)	76 (55.9)
>100,000	137 (24.1)	98 (22.7)	39 (28.7)
Health insurance
Mainstream insurance	477 (84.0)	369 (85.4)	108 (79.4)	0.10
Other insurance	63 (11.1)	41 (9.5)	22 (16.2)
No insurance	28 (4.9)	22 (5.1)	6 (4.4)
Symptom onset to arrival time (minutes, median)	172	168	188	0.22
Self-rated severity of symptoms
Mild	194 (34.2)	136 (31.5)	58 (42.6)	<0.01
Moderate	235 (41.4)	162 (37.5)	73 (53.7)
Severe	139 (24.5)	134 (31.0)	5 (3.7)
History of angina
Yes	379 (66.7)	287 (66.4)	92 (67.6)	0.79
No	189 (33.3)	145 (33.6)	44 (32.4)
Comorbidities
≥2	184 (32.4)	138 (31.9)	46 (33.8)	0.68
<2	384 (67.6)	294 (68.1)	90 (66.2)
SF-12 score
Lowest quantile	143 (25.2)	101 (23.4)	42 (30.9)	0.17
Upper 3 quantiles	425 (74.8)	331 (76.6)	94 (69.1)
GPAS trust scale
≥6	410 (72.2)	362 (83.8)	48 (35.3)	<0.01
<6	158 (27.8)	70 (16.2)	88 (66.7)
Being acquainted with a cardiologist
Yes	62 (10.9)	56 (13.0)	6 (4.4)	<0.01
No	506 (89.1)	376 (87.0)	130 (95.6)

Notes: Data are presented as number (%) except the symptom onset to arrival time; mainstream insurance includes urban employee basic health insurance scheme, Government Insurance Scheme and Labor Insurance Scheme. Percentages may not total 100% because of rounding.

Abbreviations: PCI, percutaneous coronary intervention; GPAS, General Practice Assessment Survey; RMB, renminbi; SF-12, 12-Item Short Form Health Survey.

Table 2 Regression predictors of decisions against PCI in elderly (aged 65 years of age or over) patients with first STEMI (n=568)

	Odds ratio	95% CI	P-value
Age ≥75 years	0.57	0.23–0.78	0.03
Self-rated mild symptoms^a	0.12	0.06–0.21	<0.01
GPAS trust score <6	0.14	0.09–0.28	<0.01
No acquainted cardiologist	0.28	0.07–0.42	0.008

Notes: The regression model included all other variables (age, sex, marital status, family income, health insurance, symptom onset to arrival time, education, history of angina, comorbidity, and SF-12 score)^a compared with those with severe and moderate symptoms combined.

Abbreviations: PCI, percutaneous coronary intervention; CI, confidence interval; GPAS, General Practice Assessment Survey; STEMI, ST segment elevation myocardial infarction.