Table 2 Association between factors measured at baseline and time to first hospitalisation with pneumonia (Hazard risk ratio (HRR) (95% confidence interval))

Women

1.16 (0.83–1.60)

1.34 (0.88–2.05)

Age per 10 years

1.52 (1.22–1.89)

1.29 (0.97–1.73)

  < 20

3.80 (2.16–6.67)

2.74 (1.41–5.36)

 20–25

1

1

 25–30

1.49 (0.97–2.30)

1.53 (0.95–2.48)

  > 30

2.55 (1.46–4.45)

2.54 (1.39–4.67)

 Never

1

1

 Ex

0.73 (0.43–1.24)

0.83 (0.48–1.45)

 Current

1.95 (1.30–2.95)

1.93 (1.22–3.06)

 Passive smoking^a

1.50 (0.47–4.80)

1.27 (0.31–5.30)

 Asthma

3.23 (2.07–5.02)

3.35 (1.97–5.70)

 Nasal allergy

1.17 (0.79–1.75)

0.88 (0.54–1.42)

 Hypertension

1.53 (0.92–2.86)

1.14 (0.56–2.33)

 Heart disease

3.16 (1.25–7.97)

1.48 (0.46–4.79)

 Diabetes

1.57 (0.50–4.94)

0.42 (0.06–3.07)

 Habitual snoring

1.15 (0.72–1.83)

0.80 (0.47–1.37)

 Gastroesophageal reflux

1.26 (0.67–2.35)

0.96 (0.49–1.90)