Table 3 Weighted association between care recipient’s chronic disease burden and caregiver’s burden

Outcome 1: Physical burden

Count of chronic diseases (0–9)

0.18 (0.12, 0.23) ^*

0.11 (0.03, 0.20) ^*

Disease burden

 0–1

Ref

Ref

 2

0.36 (0.04, 0.69) ^*

0.36 (-0.15, 0.87)

 3

0.39 (0.09, 0.70) ^*

0.66 (0.15, 1.16) ^*

 4

0.57 (0.26, 0.88) ^*

0.50 (0.03, 0.97) ^*

 5 + 

0.95 (0.65, 1.26) ^*

0.64 (0.16, 1.12) ^*

Outcome 2: Psychological burden

Count of chronic diseases (0–9)

0.46 (0.33, 0.58) ^*

0.36 (0.17, 0.54) ^*

Disease burden

 0–1

Ref

Ref

 2

1.59 (0.83, 2.35) ^*

1.39 (0.27, 2.50) ^*

 3

1.27 (0.56, 1.99) ^*

0.86 (-0.20, 1.93)

 4

1.52 (0.78, 2.25) ^*

1.40 (0.38, 2.42) ^*

 5 + 

2.68 (1.98, 3.39) ^*

2.22 (1.19, 3.26) ^*

Outcome 3: Social burden

Count of chronic diseases (0–9)

0.13 (0.08, 0.18) ^*

0.05 (-0.02, 0.11)

Disease burden

 0–1

Ref

Ref

 2

0.11 (-0.17, 0.39)

0.21 (-0.19, 0.60)

 3

0.28 (0.01, 0.55) ^*

-0.14 (-0.53, 0.25)

 4

0.47 (0.19, 0.74) ^*

0.25 (-0.11, 0.62)

 5 + 

0.54 (0.27, 0.80) ^*

0.15 (-0.22, 0.51)

Outcome 4: Financial burden

Count of chronic diseases (0–9)

0.02 (0.01, 0.04) ^*

0.02 (-0.01, 0.04)

Disease burden

 0–1

Ref

Ref

 2

-0.01 (-0.12, 0.09)

-0.05 (-0.19, 0.09)

 3

0.01 (-0.09, 0.10)

-0.08 (-0.22, 0.06)

 4

0.05 (-0.05, 0.16)

-0.01 (-0.14, 0.12)

 5 + 

0.08 (-0.02, 0.18)

0.01 (-0.12, 0.14)

Outcome 5: Caregiving gain

Count of chronic diseases (0–9)

0.01 (-0.02, 0.04)

-0.02 (-0.06, 0.02)

Disease burden

 0–1

Ref

Ref

 2

0.09 (-0.07, 0.26)

-0.01 (-0.26, 0.24)

 3

0.08 (-0.07, 0.24)

-0.03 (-0.27, 0.22)

 4

0.04 (-0.12, 0.19)

-0.14 (-0.37, 0.09)

 5 + 

0.09 (-0.07, 0.25)

-0.06 (-0.29, 0.17)