Table 2 Association between practice characteristics and spirometry testing among all practices

Training practice

No

1

1

Yes

1.20 (1.06–1.36)*

1.10 (0.97–1.25)

Single-handed practice

Yes

1

1

No

1.34 (1.16–1.55)*

1.24 (1.09–1.40)*

Mean age of doctors (years)

≤ 45

1

1

45–49

0.94 (0.74–1.19)

0.87 (0.66–1.14)

50–54

0.88 (0.70–1.09)

0.78 (0.60–1.00)

55–59

0.68 (0.53–0.87)*

0.58 (0.44–0.76)*

60–64

0.58 (0.43–0.79)*

0.52 (0.39–0.70)*

≥65

0.41 (0.27–0.64)*

0.33 (0.22–0.50)*