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Table 4 Multiple linear regression models of the influence of diabetes mellitus and a second chronic medical condition (i.e. hypertension, heart disease or musculoskeletal illnesses) adjusted for ethnicity, age, gender and years of education on SF-36 and SF-6D scores.

From: The impact of diabetes mellitus and other chronic medical conditions on health-related Quality of Life: Is the whole greater than the sum of its parts?

 

Co-existing chronic medical conditions among subjects with diabetes

 

No co-existing chronic medical conditions

(n = 115)

Hypertension

(n = 115)

Heart disease (n = 46)

Musculoskeletal illnesses†

(n = 107)

Physical Functioning

    

Differences in scale scores due to

    

   Diabetes mellitus

-2.9*

-2.4

-3.5*

-2.8*

   2nd chronic medical condition‡

na

-2.3*

-7.9**

-3.7***

   Interaction termξ

na

ns

12.46**

ns

Role-Physical

    

Differences in scale scores due to

    

   Diabetes mellitus

-3.7

-3.1

-5.2*

-3.6

   2nd chronic medical condition‡

na

-2.8

-12.5**

-3.1**

   Interaction termξ

na

ns

20.1**

ns

Bodily Pain

    

Differences in scale scores due to

    

   Diabetes mellitus

-1.8

-1.6

-1.5

-3.8*

   2nd chronic medical condition‡

na

-1.3

-3.1

-6.9***

   Interaction termξ

na

ns

ns

7.0**

General Health

    

Differences in scale scores due to

    

   Diabetes mellitus

-2.3*

-2.0

-1.9

-2.2*

   2nd chronic medical condition

na

-1.3

-3.5*

-3.9***

   Interaction termξ

na

ns

ns

ns

Vitality

    

Differences in scale scores due to

    

   Diabetes mellitus

-1.3

-1.4

-0.9

-1.3

   2nd chronic medical condition‡

na

0.3

-3.7*

-2.9***

   Interaction termξ

na

ns

ns

ns

Social Functioning

    

Differences in scale scores due to

    

   Diabetes mellitus

-0.1

-0.2

-1.3

-1.9

   2nd chronic medical condition‡

na

0.6

-2.5

-3.4***

   Interaction termξ

na

ns

10.2*

5.4*

Role-Emotional

    

Differences in scale scores due to

    

   Diabetes mellitus

0.3

-2.8

-0.9

0.4

   2nd chronic medical condition‡

na

-2.7

-11.8**

-3.4**

   Interaction termξ

na

9.9*

16.8*

ns

Mental Health

    

Differences in scale scores due to

    

   Diabetes mellitus

-0.2

-1.7

-0.1

-0.1

   2nd chronic medical condition‡

na

-0.5

-0.9

-2.6***

   Interaction termξ

na

5.1*

ns

ns

SF-6D

    

Differences in scale scores due to

    

   Diabetes mellitus

-0.03**

-0.02*

-0.02*

-0.02**

   2nd chronic medical condition‡

na

-0.03***

-0.06***

-0.08***

   Interaction termξ

na

ns

ns

ns

  1. †Musculoskeletal illnesses included rheumatism, back pain and other bone or muscle illnesses.
  2. ‡Second chronic medical condition refers to the chronic medical condition other than diabetes mellitus listed in the relevant column (e.g. hypertension, heart disease or musculoskeletal illnesses).
  3. ξ Interaction term for diabetes mellitus and second chronic medical condition.
  4. *p < 0.05, **p < 0.01, ***p < 0.001, ns denotes statistically insignificant.