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Table 3 Corrected Covered Area (CCA) for outcomes

From: The effectiveness of case management for cancer patients: an umbrella review

Outcomes

No. of reviews reported the outcome (c)

Sum of the number of primary studies (N)

Total number of primary studies (r)

CCAa (%)

Global Quality of Life

7

39

28

6.5

Functional status

 • Psychological function

4

18

18

0

 • Physical function

3

7

6

8.3

 • Role function

4

6

5

6.7

 • Cognitive function

5

9

5

20

 • Emotional function

3

7

5

20

 • Social function

1

5

5

/

Symptom management

7

24

23

0.7

Self-efficacy

2

4

4

0

Survivor status

2

6

4

50

Patient satisfaction

5

11

9

5.6

Cost

5

11

8

9.4

Hospital (re)admissions

2

4

4

0

Length of stay

3

5

5

0

Treatment received compliance

4

7

5

13.3%

Provision of timely treatment

1

5

5

/

Overall

8

75

57

4.5%

  1. N = the sum of the number of primary studies in each review
  2. r = the total number of primary studies
  3. c = the number of reviews
  4. less than 5%, slight overlap; 5–9.9%, moderate overlap; 10–14.9%, high overlap; over 15%, very high level of overlap [2]
  5. a\(\textrm{Corrected}\ \textrm{Covered}\ \textrm{Area}\ \left(\textrm{CCA}\right)=\frac{N-r}{rc-r}\)