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Table 1 Frequency distribution of EMS- and patient-related characteristics for calls categorized as “unclear problem” (callunclear) and “symptom-specific” categories (callspecific) given as number (N) and percent (%)

From: The difficult medical emergency call: A register-based study of predictors and outcomes

Variable   Callspecific Callunclear Total
  N = 64,026 (82%) N = 14,014 (18%) N = 78,040
EMS-related
Time of day Daytime 28,350 (44.3) 7,023 (50.1) 35,373 (45.3)
Evening 21,877 (34.2) 4,505 (32.2) 26,382 (33.8)
Night 13,799 (21.6) 2,486 (17.7) 16,285 (20.9)
Time of week Weekdays 45,459 (71.0) 10,317 (73.6) 55,776 (71.5)
Weekend 18,567 (29.0) 3,697 (26.4) 22,264 (28.5)
Assessed emergency priority level by medical dispatcher Level A 30,181 (47.1) 2,651 (18.9) 32,832 (42.0)
Level B 29,604 (46.2) 9,842 (70.2) 39,446 (50.6)
Level C 2,247 (3.5) 211 (1.5) 2,458 (3.2)
Level D 98 (0.2) 51 (0.4) 149 (0.2)
Level E 1,896 (3.0) 1,259 (9.0) 3,155 (4.0)
Response provided by medical dispatcherA Red response 30,808 (48.1) 3,232 (23.1) 34,040 (43.6)
Orange response 30,370 (47.4) 9,150 (65.3) 39,520 (50.6)
Yellow response 446 (0.7) 146 (1.0) 592 (0.8)
Blue response 2,402 (3.8) 1,486 (10.6) 3,888 (5.0)
Patient-related
Age 18–30 10,045 (15.7) 1,585 (11.3) 11,630 (14.9)
31–65 26,969 (42.1) 5,366 (38.3) 32,335 (41.4)
66–75 10,519 (16.4) 2,735 (19.5) 13,254 (17.0)
76+ 16,493 (25.8) 4,328 (30.9) 20,821 (26.7)
Gender Male 31,732 (49.5) 6,750 (48.3) 38,482 (49.3)
Female 32,318 (50.5) 7,240 (51.8) 39,558 (50.7)
Civil status Cohabiting 26,625 (41.6) 5,861 (41.8) 32,486 (41.6)
Single 36,094 (56.4) 7,907 (56.4) 44,001 (56.4)
Missing 1,307 (2.0) 246 (1.8) 1,553 (2.0)
Ethnicity Danish origin 54,271 (84.8) 11,678 (83.3) 65,949 (84.5)
Non-Danish origin 8,445 (13.2) 2,088 (14.9) 10,533 (13.5)
Missing value 1,310 (2.1) 248 (1.8) 1,558 (2.0)
Educational level Elementary school 22,910 (35.8) 4,807 (34.3) 27,717 (35.5)
Short education 24,869 (38.8) 5,634 (40.2) 30,503 (39.1)
Medium/long education 10,388 (16.2) 2,253 (16.1) 12,641 (16.2)
Missing value 5,859 (9.2) 1,320 (9.4) 7,179 (9.2)
Income 1 Low 15,565 (24.3) 3,382 (24.1) 18,947 (24.3)
2 16,250 (25.4) 3,566 (25.5) 19,816 (25.4)
3 11,733 (18.3) 2,605 (18.6) 14,338 (18.4)
4 9,379 (14.7) 2,033 (14.5) 11,412 (14.6)
5 High 8,165 (12.8) 1,898 (13.5) 10,063 (12.9)
Missing value 2,934 (4.6) 530 (3.8) 3,464 (4.4)
Employment status EmployedB 19,708 (30.8) 3,640 (26.0) 23,348 (29.9)
UnemployedC 10,796 (16.9) 2,115 (15.1) 12,911 (16.5)
Student 1,873 (2.9) 281 (2.0) 2,154 (2.8)
RetiredD 28,356 (44.3) 7,389 (52.7) 35,745 (45.8)
“Other” 1,979 (3.1) 343 (2.5) 2,322 (3.0)
Missing value 1,314 (2.1) 246 (1.8) 1,560 (2.0)
Comorbidity None 32,907 (51.4) 6,800 (48.5) 39,707 (50.9)
Mild 12,829 (20.0) 2,777 (19.8) 15,606 (20.0)
Severe 18,290 (28.6) 4,437 (31.7) 22,727 (29.1)
  1. A: Red response, acute with lights and siren; orange response, acute, no lights and siren; yellow response, transport with patient observation; blue response, medical advice, no ambulance. B: employed includes employed and unemployment insurance receiver. C: Unemployed includes unemployed individuals, social security recipients and individuals on early retirement. D: retired includes receiving state pension or being voluntary early retired