Table 3 Subgroup analysis of intervention components

Outcome Measure

Subgroups

Number of Trials Included

Odds Ratio

95% CI

I²

p Value*

Hospitalisation

Community base

2

1.21

0.70 to 2.08

0%

Non-community base

4

0.74

0.48 to 1.13

0%

Subgroup difference

0.16

Nursing background

4

0.96

0.58 to 1.60

9%

Non-nursing background

2

0.81

0.51 to 1.31

0%

Subgroup difference

0.63

High contact

2

0.49

0.19 to 1.30

0%

Low contact

3

0.97

0.61 to 1.53

19%

Subgroup difference

0.22

Supervision

3

0.99

0.60 to 1.62

19%

No supervision

3

0.78

0.47 to 1.30

0%

Subgroup difference

0.52

Low workload

4

0.74

0.48 to 1.13

0%

High workload

2

1.21

0.70 to 2.08

0%

Subgroup difference

0.16

Institutionalisation

Community base

4

0.50

0.16 to 1.61

37%

Non-community base

2

0.93

0.09 to 9.06

70%

Subgroup difference

0.64

Nursing background

6

0.44

0.20 to 0.95

23%

Non-nursing background

2

0.69

0.10 to 4.98

49%

Subgroup difference

0.67

High contact

3

0.38

0.11 to 1.34

39%

Low contact

3

1.05

0.21 to 5.18

43%

Subgroup difference

0.33

Supervision

3

0.96

0.47 to 1.95

26%

No supervision

3

0.27

0.12 to 0.61

0%

Subgroup difference

0.02

Low workload

2

0.23

0.08 to 0.67

0%

High workload

3

1.20

0.27 to 5.32

37%

Subgroup difference

0.08

Mortality

Community base

4

0.74

0.36 to 1.51

0%

Non-community base

2

1.71

0.55 to 5.30

0%

Subgroup difference

0.22

Nursing background

4

1.44

0.65 to 3.15

0%

Non-nursing background

3

1.42

0.48 to 4.22

0%

Subgroup difference

0.99

High contact

2

0.62

0.23 to 1.65

25%

Low contact

4

1.50

0.55 to 4.10

0%

Subgroup difference

0.22

Low workload

2

0.50

0.18 to 1.36

0%

High workload

3

1.26

0.52 to 3.03

0%

Subgroup difference

0.17

Outcome Measure

Subgroups

Number of Trials Included

SMD

95% CI

I²

p Value*

Patient Cognition

Community base

2

0.06

−0.23 to 0.35

0%

Non-community base

2

−0.21

−0.49 to 0.06

0%

Subgroup difference

0.18

Caregiver Burden

Supervision

2

−0.78

−1.69 to 0.14

96%

No Supervision

2

−0.24

−0.49 to 0.02

0%

Subgroup difference

0.27

Caregiver Mood

High contact

2

−0.05

−0.11 to 0.00

0%

Low contact

4

0.01

−0.13 to 0.16

1%

Subgroup difference

0.41

Caregiver quality of life

Nursing background

2

0.94

0.63 to 1.25

0%

Non-nursing background

2

0.03

−0.32 to 0.39

89%

Subgroup difference

< 0.001

Outcome Measure

Subgroups

Number of Trials Included

MD

95% CI

I²

p Value*

Patient Behaviour

Low workload

2

−13.2

−28.23 to 1.75

95%

High workload

2

−5.4

−10.63 to −0.17

0%

Subgroup difference

0.33