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. Author manuscript; available in PMC: 2020 Nov 1.
Published in final edited form as: Prehosp Emerg Care. 2019 Apr 17;23(6):772–779. doi: 10.1080/10903127.2019.1597230

Table 4.

Primary complaint comparisons by chest pain and respiratory distress reference groups (n=1,948,787a)

Comparisonb ORc P-value 95% LCLc 95% UCLc
Abdominal pain vs. Chest pain 0.1298 <0.0001 0.1269 0.1327
Abdominal pain vs. Respiratory Distress 0.6904 <0.0001 0.6752 0.7060
Altered level vs. Chest pain 0.4318 <0.0001 0.4203 0.4436
Altered level vs. Respiratory Distress 2.2977 <0.0001 2.2367 2.3605
Atypical vs. Chest pain 0.1128 <0.0001 0.1107 0.1150
Atypical vs. Respiratory Distress 0.6004 <0.0001 0.5893 0.6118
Cardiac rhythm disturbance vs. Chest pain 0.5539 <0.0001 0.5367 0.5717
Cardiac rhythm disturbance vs. Respiratory Distress 2.9476 <0.0001 2.8562 3.0418
Respiratory arrest vs. Chest pain 0.2077 <0.0001 0.1919 0.2249
Respiratory arrest vs. Respiratory Distress 1.1055 0.0003 1.0210 1.1969
Respiratory distress vs. Chest pain 5.3213 <0.0001 5.2124 5.4324
Syncope/fainting vs. Chest pain 0.3489 <0.0001 0.3395 0.3585
Syncope/fainting vs. Respiratory Distress 1.8565 <0.0001 1.8068 1.9075
a

Number of observations included in logistic mixed models; 18,755 out of 1,967,542 observations not used due to missing values

b

Estimates based on logistic mixed model results, controlling for all other model effects. P-value for primary complaint was 0.01, indicating a significant relationship between primary complaint and prehospital ECG use, controlling for all other model effects.

c

OR-odds ratio; 95% LCL-95% lower confidence limit; 95% UCL-95% upper confidence limit P<0.0001