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Table 2 Predicted daily rates of ER visits and the relative risks associated with the volcanic activity

From: Emergency room visits for respiratory conditions in children increased after Guagua Pichincha volcanic eruptions in April 2000 in Quito, Ecuador Observational Study: Time Series Analysis

 

Age groups

Males

Females

  

estimate

LCI

UCI

estimate

LCI

UCI

Daily ratesa

       
 

0–4

0.104

0.099

0.110

0.080

0.076

0.086

 

5–9

0.027

0.024

0.030

0.020

0.018

0.023

 

10–15

0.007

0.006

0.009

0.007

0.005

0.008

 

all

0.043

0.041

0.045

0.040

0.039

0.042

Relative Risksb

       

Fumarolic activity period – Period 1

     
 

0–4

2.008

1.610

2.504

1.953

1.509

2.527

 

5–9

1.698

1.075

2.681

1.358

0.746

2.472

 

10–15

1.180

0.438

3.180

1.681

0.690

4.098

 

all

1.927

1.587

2.339

1.799

1.458

2.220

One week post eruption – Period 2

     
 

0–4

2.212

1.791

2.732

2.156

1.685

2.758

 

5–9

1.331

0.797

2.222

1.106

0.571

2.140

 

10–15

2.102

0.987

4.476

0.996

0.318

3.121

 

all

1.965

1.621

2.381

1.799

1.458

2.220

Two weeks post eruption – Period 3

     
 

0–4

1.995

1.699

2.344

2.280

1.913

2.718

 

5–9

1.434

1.004

2.048

1.108

0.691

1.777

 

10–15

1.820

1.013

3.270

0.488

0.156

1.530

 

all

1.795

1.552

2.076

1.894

1.632

2.199

Three weeks post eruption – Period 4

     
 

0–4

2.056

1.799

2.350

2.096

1.798

2.442

 

5–9

1.579

1.188

2.100

1.067

0.717

1.586

 

10–15

1.625

0.972

2.716

0.879

0.431

1.790

 

all

1.891

1.678

2.130

1.807

1.591

2.052

  1. aestimated baseline together with 95% confidence interval (LCI, UCI) for cases per day per 1000 served population before and after volcanic eruption.
  2. b relative risks together with 95% confidence interval (LCI, UCI) for cases per day per 1000 served population for effects of the day of the week, official holidays and weekly precipitation.