Figure 1.. Comparisons between G1 and G2. Frequency of chest X-rays according to age (A) and time spent in the ED (B); G1 logistic regression: odds ratio (OR)=1.024, 95% confidence interval (CI) 1.016-1.032; G2 logistic regression: OR=1.030, 95% CI 1.023-1.038; C: the most common pathological chest X-ray findings; D: rates of reported clinical findings.
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