Table 3—

Raw cognitive test scores

DCCT baseline (1983–1989)
EDIC year 12 (2005)
IntensiveConventionalIntensiveConventional
n82938293
Problem solving
    Similarities*12.2 ± 2.812.1 ± 2.513.8 ± 2.213.1 ± 2.4
    Category test (no. errors)30.7 ± 18.232.3 ± 22.915.0 ± 10.814.9 ± 12.9
Learning
    Symbol-digit learning (no. correct)24.5 ± 4.324.5 ± 4.525.7 ± 2.924.8 ± 4.4
    Tactual performance memory (no. correct)7.4 ± 1.57.3 ± 1.78.1 ± 1.27.8 ± 1.5
Immediate memory
    Visual reproductions (no. correct)14.6 ± 1.914.5 ± 2.415.3 ± 1.515.1 ± 1.7
    Short-term memory (no. correct)38.0 ± 9.537.5 ± 10.242.7 ± 11.040.1 ± 11.8
    Logical memory (no. correct)19.7 ± 5.719.5 ± 5.420.9 ± 8.520.0 ± 5.3
    Digit symbol (no. correct)8.4 ± 1.08.1 ± 1.48.0 ± 1.67.9 ± 1.5
Delayed recall
    Visual reproductions (no. correct)15.5 ± 1.515.4 ± 1.715.5 ± 1.415.3 ± 1.7
     Logical memory (no. correct)15.9 ± 5.216.3 ± 5.218.4 ± 8.917.9 ± 8.0
Spatial information
    Embedded figures (time in s)7.4 ± 3.27.0 ± 2.65.5 ± 2.65.3 ± 2.2
    Object assembly*11.5 ± 2.612.0 ± 2.814.5 ± 2.514.2 ± 2.7
    Block design*12.6 ± 2.412.1 ± 2.814.1 ± 2.413.8 ± 2.8
    Tactual performance test (time in min) 10.7 ± 3.810.9 ± 3.48.6 ± 3.19.4 ± 3.0
Attention
    Digit vigilance (time in s)398.8 ± 77.9401.5 ± 91.2365.2 ± 80.0386.1 ± 84.6
    Digit vigilance (no. errors)6.0 ± 5.76.4 ± 5.65.4 ± 6.16.2 ± 6.2
    Digit span*11.1 ± 3.011.1 ± 2.712.2 ± 2.811.8 ± 3.1
Psychomotor and mental efficiency
    Verbal fluency (no. correct)37.8 ± 9.337.4 ± 10.448.8 ± 12.745.6 ± 13.6
    Digit symbol, 90-s total (no. correct)62.4 ± 13.160.2 ± 11.467.8 ± 10.566.3 ± 9.1
    Trail making, part B (time in s)51.3 ± 16.651.9 ± 16.245.6 ± 12.848.9 ± 15.1
    Grooved peg test, dominant hand (time in s)66.4 ± 10.466.9 ± 9.466.0 ± 11.366.9 ± 13.0
    Grooved peg test, nondominant hand (time in s)71.0 ± 10.772.8 ± 12.372.0 ± 12.274.4 ± 17.8
Motor speed
    Finger tapping, dominant hand (no. taps in 10 s)46.0 ± 6.945.0 ± 6.452.1 ± 7.150.6 ± 7.1
    Finger tapping, nondominant hand (no. taps in 10 s)43.0 ± 6.441.7 ± 5.846.9 ± 5.944.5 ± 7.1
  • Data are means ±SD.

  • * Scaled scores.

  • Higher scores indicate poorer performance.