Table 5.
Adverse asthma outcomes and asthma control by history of medication use and work-related asthma (WRA) status.
| Adverse asthma outcomes | Total PRa (95% CI) |
Medication use in last 3 months PRa (95% CI) |
No medication use in last 3 months PRa (95% CI) |
|---|---|---|---|
| Asthma attackb | |||
| WRA | 1.62 (1.47–1.79) | 1.42 (1.28–1.57) | 2.16 (1.72–2.70) |
| Possible WRA | 1.32 (1.20–1.44) | 1.24 (1.13–1.35) | 1.44 (1.14–1.78) |
| Non-WRA | 1.00 | 1.00 | 1.00 |
| Urgent treatmentb | |||
| WRA | 1.51 (1.28–1.77) | 1.18 (1.02–1.35) | 2.13 (1.38–3.30) |
| Possible WRA | 1.22 (1.06–1.40) | 1.11 (0.98–1.24) | 0.91 (0.60–1.40) |
| Non-WRA | 1.00 | 1.00 | 1.00 |
| ER visitb | |||
| WRA | 1.65 (1.24–2.20) | 1.40 (1.05–1.84) | — |
| Possible WRA | 1.26 (0.99–1.61) | 1.17 (0.92–1.49) | 1.33 (0.73–2.42) |
| Non-WRA | 1.00 | 1.00 | 1.00 |
| Overnight hospital stayb | |||
| WRA | 1.18 (0.72–1.93) | 1.10 (0.65–1.84) | — |
| Possible WRA | 1.27 (0.79–2.05) | 1.33 (0.82–2.17) | — |
| Non-WRA | 1.00 | 1.00 | — |
| Well-controlled asthmac | |||
| WRA | 0.74 (0.64–0.85) | 0.68 (0.54–0.85) | 0.87 (0.77–0.98) |
| Possible WRA | 0.81 (0.75–0.88) | 0.80 (0.70–0.92) | 0.89 (0.81–0.96) |
| Non-WRA | 1.00 | 1.00 | 1.00 |
| Not well-controlled asthmac | |||
| WRA | 1.16 (0.95–1.41) | 0.99 (0.80–1.23) | 1.69 (1.05–2.74) |
| Possible WRA | 1.19 (1.03–1.38) | 1.06 (0.91–1.23) | 1.65 (1.11–2.47) |
| Non-WRA | 1.00 | 1.00 | 1.00 |
| Very poorly controlled asthmac | |||
| WRA | 1.54 (1.28–1.86) | 1.47 (1.22–1.76) | 1.49 (0.89–2.49) |
| Possible WRA | 1.31 (1.14–1.50) | 1.22 (1.07–1.39) | 1.36 (0.86–2.16) |
| Non-WRA | 1.00 | 1.00 | 1.00 |
Consists of five models where the outcome variables were adverse asthma outcomes and asthma control and the predictor variable was WRA status, adjusted for age, sex, race/ethnicity, income, health insurance, current employment status, and chronic obstructive pulmonary disease among the total population and those reporting medication use in last 3 months.
In the last 12 months.
Based on NAEPP Expert Panel Report 3: Guidelines for the Diagnosis and Management of Asthma, using information on the number of days with any asthma symptoms and nighttime awakenings in the last 30 days, and the frequency of inhaler SABA use in the last 3 months.
CI, confidence interval; PR, prevalence ratio; WRA, work-related asthma; Bold text indicates significance; “–” indicates relative standard error >30%, estimate not reportable.