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Table 3—

Individual effects and correlates of cognitive disruptions during hyperglycemia

Study 1Study 2Study 3
Mean no. of SMBGs >15 mmol/l 17.8 19.4 17.9 
Number of tests significantly impaired: % subjects with impaired performance    
    0 45% 46% 41% 
    1 24% 33% 48% 
    2 16% 8% 12% 
    3 11% 13%  
% subjects with specific tests significantly affected by hyperglycemia    
    Subtractions, speed 21% 38% 19% 
    Subtractions, errors 20% 21% 52% 
    A words 20% 21%  
    Reaction time 28%   
    PSAT 1  4%  
    PSAT 2  4%  
Relationship with no. of cognitive tests impaired    
    Duration  r = −0.36*  
    HbA1c r = 0.20 r = −0.30* r = 0.34 
    % SMBGs >15 mmol/l r = 0.20* r = −0.29 r = 0.39 
    Mean euglycemic performance r = −0.18 r = −0.38* r = −0.19* 
Study 1Study 2Study 3
Mean no. of SMBGs >15 mmol/l 17.8 19.4 17.9 
Number of tests significantly impaired: % subjects with impaired performance    
    0 45% 46% 41% 
    1 24% 33% 48% 
    2 16% 8% 12% 
    3 11% 13%  
% subjects with specific tests significantly affected by hyperglycemia    
    Subtractions, speed 21% 38% 19% 
    Subtractions, errors 20% 21% 52% 
    A words 20% 21%  
    Reaction time 28%   
    PSAT 1  4%  
    PSAT 2  4%  
Relationship with no. of cognitive tests impaired    
    Duration  r = −0.36*  
    HbA1c r = 0.20 r = −0.30* r = 0.34 
    % SMBGs >15 mmol/l r = 0.20* r = −0.29 r = 0.39 
    Mean euglycemic performance r = −0.18 r = −0.38* r = −0.19* 
*

P < 0.05,

P < 0.1,

P < 0.01.

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