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Table 1 Differences on demographics and outcomes between HUSK-participants with birth journal information (N=346) and participants without (N=1,810)

From: The impact of early life factors on cognitive function in old age: The Hordaland Health Study (HUSK)

   Proportion/mean with birth journal information Proportion/mean without birth journal information p-value/Mean difference (CI95%)*
Gender (% female)   53.8% 55.3% p=0.599
Education (% post-compulsory)   60.5%a 62.9%b p=0.429
Self-reported health (% good)   70.5%c 67.6%d p=0.311
Composite scoree   0.08 −0.01 0.09 (−0.02, 0.21)
Separate cognitive tests f     
  MMS 11.55 11.51 0.04 (−0.05, 0.13)
  Digit Symbol 10.60 10.18 0.42 (−0.06, 0.91)
  KOLT 35.49 35.17 0.32 (−0.61, 1.25)
  COWAT 15.51 15.02 0.49 (−0.15, 1.12)
  TMA 55.23 57.67 −2.44(−6.39, 1.50)
  Block Design 15.01 15.01 0.00 (−0.26, 0.26)
  1. 95% confidence intervals in brackets.
  2. *p-values derived from χ2 and mean difference derived from independent samples t-tests.
  3. aAvailable information from N=326.
  4. bAvailable information from N=1655.
  5. cAvailable information from N=335.
  6. dAvailable information from N=1789.
  7. eComposite score: Z-score of the sum of all cognitive tests (mean: 0, standard deviation: 1).
  8. fTest-specific raw scores for each cognitive tests (see Methods section for further details).