Table 2 Public assistance recipients’ unscheduled asthma care visits: crude and adjusted incidence ratios and 95% confidence intervals

Explanatory variables

 Work status

Not working

Ref

Ref

Working

1.52 (1.07–2.15)

1.44 (1.00–2.07)

 Household composition

Living alone

Ref

Ref

Living with children

1.52 (0.93–2.5)

0.99 (0.58–1.70)

Living with adults

1.26 (0.85–1.87)

1.03 (0.67–1.57)

 Nationality

Japanese

Ref

Ref

Other

0.98 (0.41–2.33)

0.97 (0.41–2.28)

Covariates

 Age

by 10 years

0.77 (0.67–0.88)

0.79 (0.68–0.93)

 Sex

Male

Ref

Ref

Female

1.76 (1.24–2.52)

1.64 (1.13–2.38)

 Disabilities certificate

None

Ref

Ref

Mental disability

1.35 (0.87–2.1)

1.47 (0.92–2.33)

Intellectual disability

0.89 (0.29–2.75)

0.72 (0.22–2.33)

Physical disability

1.25 (0.64–2.43)

1.67 (0.85–3.26)

 Municipality

A

Ref

Ref

B

0.96 (0.64–1.44)

0.97 (0.65–1.45)