Methods to assess asthma self regulation in female patients Noreen M. Clark Center for Managing Chronic Disease University of Michigan

1. METHODS TO ASSESS ASTHMA SELF-REGULATION IN FEMALE PATIENTS Noreen M. Clark, Molly Z. Gong, Melissa A. Valerio, Jimmy Yu, Xihong Lin, William F. Bria, Timothy B. Johnson Supported by NHLBI Grant HL60884 May 22, 2001

2. BACKGROUND Recent research suggests that self-regulatory management of asthma follows a sequential path. A four-phase model of self-regulatory control of asthma was assessed in our research, using a qualitative data collection instrument, the Asthma Self-Regulatory Development Interview (ASRDI), used by Zimmerman and colleagues (1997).

3. PURPOSE The general purpose of the study was to examine whether the ASRDI and four-phase model of self-regulation development used in childhood asthma could be used to assess self-regulation in women with asthma.

5. SAMPLE Data were collected by telephone from a total of 100 women,18 years of age or older, with a diagnosis of asthma.

6. Ethnicity & Age 6% 5% 51-60 30% 41-50 26% 31 - 40 23% 61 - 70 13% >70 years 1% 20 - 30 6% < 20 1% African - American Other

7. Annual Household Income & Education < High School Grad 2%

8. Marital & Working Status At Home 21% Full Time 52% Part Time 27% Single 14% Married 73% Divorced 10% Widowed 3%

9. Medical Insurance 98% 2%

10. METHODS 1. Assessed women’s asthma self-regulation phases using the Asthma Self-Regulatory Development Interview (ASRDI)

11. THE FOUR PHASES OF ASTHMA SELF-REGULATION (Zimmerman et al.) Phase I - Asthma Avoidance Phase II - Asthma Acceptance Phase III - Asthma Compliance Phase IV - Asthma Self-Regulation

15. Two differences were identified when using ASRDI to measure self-regulation phases in women with asthma versus children with asthma. 1. The four self-regulatory phases are not as sequential in women with asthma as in children with asthma. Over 25% of the women who correctly answered questions related to a higher ASRDI phase did not pass a lower or previous phase.

16. Examples of Women’s Scores and Phases

17. 2. When using the ASRDI with women versus children, some responses could not be clearly scored as ‘pass’ or ‘fail’ only. Finer levels of classification of ASRDI responses appear to be needed for women with asthma.

18. Example 1 - First item in Phase I or II

19. Example 2 - Third item in Phase III

21. NUMERICAL CODING & SCORING SYSTEM

22. Codes - First item in Phase I or II

23. Codes - Third item in Phase III

24. DATA ANALYSIS & RESULTS

25. Factor Analysis

26. Association between women’s asthma regulation phases and asthma outcomes using the ASRDI scoring system:

27. Association between women’s asthma regulation phases and asthma outcomes using the new coding system:

28. Further Quantitative Plan