Recruitments
Data analysis
• In this analysis, STATA should use for combining the data from the studies under review, with a view to examining the severity and significance of the relationship between overall cognitive dysfunction and depression disorder; the software executed this by combining the results from two or more studies.
• The meta-analysis results must present in figures (Forest plots). The Figures provide a visual summary of the strength and significance of the relationships model between overall cognitive dysfunction and depression.
• The forest plots divide into five as following:
1. Meta-analysis results for correlation coefficients between overall cognitive dysfunction and depression disorder post stroke for all the 17 studies together.
2. Correlation coefficient within the acute phase (1 month of stroke) includes 3 studies.
3. Correlation coefficients 3 months after stroke includes 6 studies
4. Correlation coefficients 6 months after stroke includes 6 studies
5. Correlation coefficients 6 months after stroke includes 4 studies
6. Correlation coefficients more than 12 months after stroke 6 studies.
• In the forest plots add: Authors & year publish, correlation, lower limit, upper limit, z-values and p-values.
• In the Forest plots, please add also sample sizes and add heterogeneity statistics (eg the I-squared or Q) If the heterogeneity is high, does this suggest that the meta-analysis is invalid? And is there the possibility of publication bias – and could this be detected in any way?
• Forest plot 1: Correlation coefficients between post stroke overall cognitive dysfunction and depression disorder for all 17 studies

Authors & year published
Sample size
Correlation (r)
Robinson & Price (1982)
103 – .18
Parikh et al., (1987)
86 .44
Starkstein et al., (1989) 93 .15
Eastwood et al., 1(989) 87 – .08
House et al., (1990) 128 – .22
Jonkman et al., (1998) 35 .08
Starr et al., (2000) 49 – .46
Spalletta et al., (2002) 153 – .51
Narushima et al., (2003) 59 – .31
Wilz and Barskova, (2007) 81 – .24
Passier et al., (2010) 111 .59
Duits et al., (2012) 105 .43
Farner et al., (2010) 126 .14
Lamb et al., (2013) 25 – .33
Taylor- Piliae and Ruth (2013) 100 – .05
Hosking and Marsh (2013) 67 .11
Allan et al., (2013) 355 – .26

• Forest plot 2: Correlation coefficients between post stroke overall cognitive dysfunction and depression disorder within the acute phase (1 month)

Authors & year published
Sample size
Correlation (r)
Parikh et al., (1987)
86 .30
Starkstein et al., (1989) 93 .15
House et al., (1990) 128 – .32

• Forest plot 3: Correlation coefficients between post stroke overall cognitive dysfunction and depression disorder after 3 months

Authors & year published
Sample size
Correlation (r)
Parikh et al., (1987)
40 .20
Eastwood et al., 1(989) 87 – .08
Jonkman et al., (1998) 35 .08
Spalletta et al., (2002) 153 – .51
Wilz and Barskova, (2007) 81 – .34
Passier et al., (2010) 111 .59

• Forest plot 4: Correlation coefficients between post stroke overall cognitive dysfunction and depression disorder after 6 months

Authors & year published
Sample size
Correlation (r)
Robinson & Price (1982)
103 – .18
Parikh et al., (1987)
50 .40
House et al., (1990) 119 – .28
Narushima et al., (2003) 59 – .31
Duits et al., (2012) 105 .43
Lamb et al., (2013) 25 .55

• Forest plot 5: Correlation coefficients between post stroke overall cognitive dysfunction and depression disorder after 12 months

Authors & year published
Sample size
Correlation (r)
Parikh et al., (1987)
38 .35
House et al., (1990) 112 – .12
Hosking and Marsh (2013) 67 – .30
Allan et al., (2013) 270 – .27

• Forest plot 6: Correlation coefficients between post stroke overall cognitive dysfunction and depression disorder more than 12 months

Authors & year published
Sample size
Correlation (r)
Parikh et al., (1987)
48 .41
Starr et al., (2000) 49 – .46
Wilz and Barskova, (2007) 81 – .13
Farner et al., (2010) 126 .14
Taylor- Piliae and Ruth (2013) 100 – .05
Allan et al., (2013) 226 – .24

• Please ask me if you need more information.

• Forest plot 1: Correlation coefficients between post stroke overall cognitive dysfunction and depression disorder for all 17 studies

Authors & year published
Sample size
Correlation (r)
Robinson & Price (1982)

Parikh et al., (1987)

Starkstein et al., (1989)
Eastwood et al., 1(989)
House et al., (1990)
Jonkman et al., (1998)
Starr et al., (2000)
Spalletta et al., (2002)
Narushima et al., (2003)
Wilz and Barskova, (2007)
Passier et al., (2010)
Duits et al., (2012)
Farner et al., (2010)
Lamb et al., (2013)
Taylor- Piliae and Ruth (2013)
Hosking and Marsh (2013)
Allan et al., (2013)