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Table 2 Relative risks a and 95% confidence intervals for daily medical consultations for pollinosis in association with exposure to AD

From: Association of Asian Dust with daily medical consultations for pollinosis in Fukuoka City, Japan

Lag period for AD

AD only

(Single-pollutant model)

AD with SPM b

(Bi-pollutant model)

RR c

95% CI

RR c

95% CI

P-value for AD × SPM

Clinic I (n = 18571)

 Lag 0

1.215

1.003

1.472

1.383

1.046

1.828

0.43

 Lag 1

1.353

1.116

1.640

1.814

1.348

2.442

0.05

 Lag 2

1.284

1.053

1.566

1.850

1.361

2.516

0.01

 Lag 3

1.362

1.130

1.642

1.628

1.201

2.206

0.31

 Lag 4

1.404

1.160

1.700

1.897

1.406

2.559

0.05

 Lag 5

1.211

0.991

1.479

1.707

1.250

2.331

0.01

 Lag 6

1.315

1.078

1.605

1.814

1.353

2.433

>0.01

 Lags 0–5

1.241

1.095

1.407

1.440

1.175

1.766

0.31

Clinic II (n =14741)

 Lag 0

1.344

1.316

1.373

1.107

0.863

1.421

0.70

 Lag 1

0.948

0.779

1.155

1.022

0.762

1.370

0.93

 Lag 2

0.925

0.765

1.118

1.011

0.759

1.346

0.67

 Lag 3

1.080

0.905

1.288

1.222

0.917

1.629

0.57

 Lag 4

1.082

0.905

1.293

1.207

0.908

1.605

0.57

 Lag 5

1.067

0.889

1.280

1.122

0.851

1.479

0.77

 Lag 6

0.890

0.739

1.072

1.001

0.770

1.301

0.21

 Lags 0–5

1.029

0.919

1.152

1.120

0.933

1.345

0.62

Clinic III (n = 26186)

 Lag 0

1.177

0.993

1.394

1.119

0.879

1.426

0.37

 Lag 1

1.126

0.944

1.344

1.049

0.804

1.370

0.37

 Lag 2

1.214

1.019

1.445

1.196

0.916

1.560

0.82

 Lag 3

1.276

1.079

1.509

1.273

0.971

1.669

0.75

 Lag 4

1.241

1.047

1.470

1.200

0.923

1.559

0.47

 Lag 5

1.192

1.005

1.415

1.151

0.891

1.488

0.53

 Lag 6

1.142

0.961

1.358

1.179

0.922

1.509

0.78

 Lags 0–5

1.147

1.025

1.283

1.167

0.975

1.397

0.90

Clinic IV (n = 5990)

 Lag 0

1.506

1.101

2.060

1.442

0.891

2.332

0.83

 Lag 1

1.734

1.288

2.334

2.177

1.342

3.533

0.25

 Lag 2

1.769

1.286

2.434

2.299

1.384

3.820

0.16

 Lag 3

1.668

1.216

2.288

1.820

1.090

3.038

0.58

 Lag 4

1.761

1.275

2.430

1.646

1.002

2.706

0.80

 Lag 5

1.181

0.851

1.639

1.244

0.748

2.069

0.76

 Lag 6

1.364

0.980

1.899

1.655

0.999

2.741

0.27

 Lags 0–5

1.594

1.283

1.980

2.024

1.408

2.910

0.07

Pooled estimates

 Lag 0

1.175

1.061

1.301

1.203

1.045

1.385

-

 Lag 1

1.238

0.976

1.570

1.395

0.970

2.006

-

 Lag 2

1.238

0.972

1.576

1.456

1.021

2.075

-

 Lag 3

1.290

1.111

1.497

1.391

1.184

1.634

-

 Lag 4

1.309

1.099

1.559

1.427

1.122

1.816

-

 Lag 5

1.156

1.045

1.279

1.278

1.039

1.572

-

 Lag 6

1.142

0.943

1.383

1.337

1.006

1.777

-

 Lags 0–5

1.215

1.031

1.431

1.348

1.075

1.690

-

  1. AD Asian dust, SPM suspended particulate matter, RR relative risk, CI confidence interval
  2. aUsing single-lag model with adjustment for the day of the week, public holidays, month, year, pollen (average lag 0–5), interaction between AD-pollen and the natural cubic splines of daily mean temperature and relative humidity with 3° of freedom
  3. bAdditional adjustment for SPM (average lags 0–5) and the corresponding interaction between AD-SPM; refer to Additional file 1: Table S1 for further information
  4. cReference: AD-free days