Table 1. Patient and population characteristics of study population (n = 303)
Variablen (%)Remarks
SexMale148 (48.8)
Female155 (51.2)
Age, years≤3015 (5.0) Mean age, years (range): 58.3 (17–100)
31–4025 (8.3)
41–5047 (15.5)
51–6078 (25.7)
61–7074 (24.4)
71–8043 (14.2)
>8021 (6.9)
Type of contact(missing data n = 1)Consultation, daytime, own GP139 (46.0)  150 patients (49.7%) seen by their own GP during office hours, 152 patients (50.3%) seen by GP on call at OOH service
Home visit, daytime, own GP11 (3.6)
Consultation, OOH service146 (48.3)
Home visit, OOH service6 (2.0)
HistoryNo DM2 or prior CVD179 (59.1)
DM222 (7.3)
Prior CVD90 (29.7)
DM2 and prior CVD12 (4.0)
Duration of complaints at presentation, hours(missing data n = 6)0–132 (10.8)  –
2–383 (27.9)
4–662 (20.9)
7–1252 (17.5)
13–2468 (22.9)
eGFR, ml/min(missing data n = 49) ≤303 (1.2)
 31–6042 (16.5)
 >6009 (82.3)
ECG performed(missing data n = 1) No50 (16.6)
 Yes, no abnormalities152 (50.3)
 Yes, with abnormalities100 (33.1)
Referral policy No referral167 (55.1)  Overall referral percentage: 44.9% Overall direct referral percentage: 37.0% Overall referral percentage at later time: 7.9%
 Direct referral on presentation to cardiologist107 (35.3)
 Direct referral on presentation, other5 (1.7)
 Referral at later time during follow-up, cardiologist20 (6.6)
 Referral at later time during follow-up, other4 (1.3)
Troponin available Troponin available (all patients)267 (88.1)
Troponin available (non-referred patients)171 (87.2)
 Troponin available (referred patients)96 (89.7)
  • CVD = cardiovascular disease. DM2 = type 2 diabetes mellitus. ECG = electrocardiogram. eGFR = estimated glomerular filtration rate. OOH service = out-of-hours service.