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Table 1 Description and statistical comparison of patient characteristics in primary and secondary data samples (EMAAGE)

From: Primary and secondary data in emergency medicine health services research – a comparative analysis in a regional research network on multimorbid patients

Variable

Primary data sample

(n=326)

n (%, [95% CI])

Secondary data sample

(n=439)

n (%)

p value

Gender

  

.380

 Male

107 (32.8, [27.7; 37.9])

140 (31.9)

 

 Female

219 (67.2, [62.1; 72.3])

299 (68.1)

Age in years (mean (SD))

75.8 (12.1, [74.5; 77.1])

76.8 (13.6)

.132

Multi-morbidity: Yes

213 (65.3, [60.1; 70.5])

252 (57.4)

.002

MTS categorya

  

.043

 1 (immediate treatment)

1 (0.4)

6 (2.4)

 

 2 (very urgent treatment)

44 (16.4, [12.0; 20.8])

32 (12.6)

 3 (urgent treatment)

187 (69.8, [64.3; 75.3])

181 (71.5)

 4 (normal)

32 (11.9, [8.0; 15.8])

34 (13.4)

 5 (not urgent)

4 (1.5)

0 (0)

Transportation to ED

  

<.001

 Walk-in

9 (2.9, [1.0; 4.8])

26 (7.1)

 

 Non-urgent medically accompanied transport

49 (15.9, [11.8; 20.0])

76 (20.7)

 Emergency medical services

211 (68.3, [63.1; 73.5])

239 (65.1)

 EMS with emergency physician

40 (12.9, [9.2; 16.6])

26 (7.1)

Case type

  

<.001

 Outpatient

0 (0)

14 (3.2)

 

 Inpatient

326 (100)

425 (96.8)

Discharge type

  

<.001

 Home or existing care arrangement

100 (31.6, [26.5; 36.7])

191 (44.9)

 

 Transfer (to another hospital or health care facility)

206 (65.2, [59.9; 70.5])

206 (48.5)

 Deceased

8 (2.5, [0.8; 4.2])

24 (5.6)

 Other

2 (0.6)

4 (0.9)

  1. Note: 95% Wald confidence intervals were computed for population proportions of n≥5. CI Confidence interval, ED Emergency department, EMS Emergency medical services, MTS Manchester Triage System, SD Standard deviation; aThe chi-square goodness-of-fit test was conducted with an adjusted variable for MTS category containing categories 1 to 4 due to missing values in the secondary data sample