Table 2 Test accuracy of the Cog-4 and the Montreal Cognitive Assessment (MoCA) with ≤25 p, ≤20 p and ≤19 p as the thresholds for cognitive impairment (n = 531).

From: NIHSS is not enough for cognitive screening in acute stroke: A cross-sectional, retrospective study

2a*

MoCA ≥ 26 p

MoCA ≤ 25 p

Cog-4, normal 0 p

175 (81%)

205 (65%)

Cog-4, impaired ≥1 p

40 (19%)

111 (35%)

2b^

MoCA ≥ 24 p

MoCA ≤ 23 p

Cog-4, normal 0 p

251 (81%)

129 (58%)

Cog-4, impaired ≥1 p

58 (19%)

93 (42%)

2c"

MoCA ≥ 20 p

MoCA ≤ 19 p

Cog-4, normal 0 p

329 (76%)

51 (53%)

Cog-4, impaired ≥1 p

105 (24%)

46 (47%)

  1. * Statistics: Fisher’s exact test: p < 0.001. Measurement of agreement, Cohen’s kappa: -0.173, SE 0.039, approximate Tb -4.143, p < 0.001.
  2. ^Statistics: Fisher’s exact test: p < 0.001. Measurement of agreement, Cohen’s kappa: -0.210, SE 0.037, approximate Tb -5.826, p < 0.001.
  3. “Statistics: Fisher’s exact test: p < 0.001. Measurement of agreement, Cohen’s kappa: -0.109, SE 0.028, approximate Tb -4.585, p < 0.001.
  4. Note: p, points
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