Table 4 Univariate odds ratios of subjects’ characteristic for SBS symptoms

Gender

female (vs. male)

1.50 (0.58–3.39)

0.455

2.35 (1.19–4.46)

0.014

1.15 (0.19–2.69)

0.743

2.61 (1.19–5.71)

0.017

2.00 (0.80–5.00)

0.138

1.98 (1.16–3.38)

0.013

Age

 ≤30

3.39 (0.99–11.5)

0.051

1.44 (0.39–5.25)

0.585

4.44 (1.41–14.0)

0.011

2.62 (0.88–7.78)

0.083

0.54 (0.07–4.23)

0.554

2.04 (0.80–5.24)

0.137

 30–39

1.10 (0.34–3.56)

0.878

3.40 (1.64–7.04)

0.001

1.69 (0.60–4.76)

0.317

1.77 (0.78–4.04)

0.173

1.22 (0.45–3.27)

0.695

2.44 (1.31–4.55)

0.005

 40–49

0.69 (0.15–3.21)

0.636

1.83 (0.75–4.47)

0.182

0.34 (0.04–2.68)

0.305

1.57 (0.62–3.97)

0.339

1.03 (3.28–3.24)

0.959

1.68 (0.81–3.45)

0.161

 50–59

1.08 (0.39–2.99)

0.889

1.60 (0.77–3.36)

0.211

0.70 (0.22–2.26)

0.555

0.86 (0.36–2.05)

0.738

0.51 (0.16–1.56)

0.236

1.09 (0.58–2.03)

0.799

 ≥60

Reference

Reference

Reference

Reference

Reference

Reference

Occupation

 Full-time

Reference

Reference

Reference

Reference

Reference

Reference

 Part-time

0.53 (0.13–2.12)

0.371

0.90 (0.38–2.14)

0.814

0.46 (0.12–0.18)

0.264

1.15 (0.43–3.11)

0.784

1.30 (0.40–4.17)

0.662

1.54 (0.76–3.12)

0.232

 Retired or unemployed

0.99 (0.40–2.48)

0.985

1.10 (0.57–2.13)

0.782

0.86 (0.36–2.07)

0.735

1.50 (0.69–3.28)

0.305

1.32 (0.51–3.43)

0.563

1.38 (0.77–2.48)

0.282

 Student, unknown

1.71 (1.89–15.5)

0.632

0.80 (0.09–6.82)

0.840

0.00^a

0.999

1.31 (0.15–11.5)

0.808

0.00^a

0.999

0.60 (0.07–5.02)

0.636

Allergy or asthma

4.63 (1.83–11.7)

0.001

11.9 (5.30–26.9)

<0.0001

3.75 (1.55–9.04)

0.003

4.75 (2.36–9.57)

<0.0001

2.59 (1.19–5.66)

0.017

5.39 (3.20–9.07)

<0.0001