Classification of Neurocognition in Japanese Patients with Schizophrenia: A Cluster Analysis

Table 2

Cognitive score across subtypes (n = 133).

	Overall		Cluster 1			Cluster 2			Cluster 3			Cluster 4			F
	n = 133		n = 16			n = 44			n = 42			n = 31
	Mean	SD	Mean	SD		Mean	SD		Mean	SD		Mean	SD
Cognitive function
Speed of processing	94.5	11.4	76.3	8.6	<0.001^a	89.4	8.1	<0.001^b	99.5	6.5	0.656^c	104.4	5.3	<0.001^c	69.391	<0.001
Visual attention	98.2	9.8	80.8	7.7	<0.001^a	94.1	4.8	<0.001^b	102.7	4.6	<0.001^c	106.8	6.1	<0.001^d	97.541	<0.001
Woking memory—reaction time	96.1	7.9	85.0	5.4	<0.001^a	92.5	6.1	<0.001^b	98.8	5.3	0.146^c	103.3	4.8	0.001^d	49.199	<0.001
Working memory—accuracy	89.5	14.6	67.8	4.5	<0.001^a	81.5	10.9	<0.001^b	102.4	8.9	0.095^c	94.5	6.8	<0.001^d	77.237	<0.001
Visual learning	95.4	11.3	85.0	7.7	<0.001^a	91.6	9.3	<0.001^b	106.0	8.4	<0.001^c	91.7	7.6	<0.001^b	34.617	<0.001
Spatial attention	86.6	12.4	67.8	8.5	<0.001^a	82.2	11.4	<0.001^b	93.6	7.5	<0.001^c	93.0	7.0	<0.001^c	40.353	<0.001

^αcomparing to 100 as a average score of healthy control using t-test. ^βone-way analysis of variance. ^a,b,c,d: the different letters mean significant differences between letters.