Effects of age of onset on clinical characteristics in schizophrenia spectrum disorders

BMC Psychiatry

Table 1 Means (and SD) of demographic and clinical characteristics for the schizophrenia (n = 52) and schizoaffective (n = 52) groups

	Schizophrenic disorder Mean (SD)	Schizoaffective disorder Mean (SD)	t	Significance
Age	40.23 (10.06)	38.25 (10.51)	0.982	0.329
Education	12.88 (2.66)	12.88 (2.86)	0.000	1
BMI	24.95 (5.23)	25.27 (4.03)	-0.354	0.724
Age of illness onset	25.56 (7.94)	22.73 (6.98)	1.927	0.06
Illness duration	14.67 (8.85)	15.52 (8.33)	-0.502	0.617
Previous hospitalization	6.51 (3.80)	7.96 (4.64)	-1.734	0.086
SAIQ need for treatment	10.13 (2.90)	11.31 (3.25)	-1.941	0.055
SAIQ presence/outcome of illness	8.29 (3.27)	9.88 (3.78)	-2.303	0.023*
PANSS positive	15.13 (3.44)	15.48 (3.44)	-0.513	0.609
PANSS negative	19.25 (5.32)	19.11 (4.50)	0.139	0.889
PANSS cognitive	19.35 (5.16)	21.79 (4.25)	-2.633	0.01*
PANSS total score	73.71 (16.33)	80.38 (12.51)	-2.339	0.021*
BIS motor	14.67 (5.38)	16.63 (5.97)	-1.76	0.081
BIS attention	9.21 (4.52)	11.25 (4.68)	-2.26	0.026*
BIS non-planning	15.25 (5.53)	16.90 (4.81)	-1.628	0.107
BIS total score	39.13 (13.28)	44.79 (12.75)	-2.215	0.029*
BDI	12.25 (10.14)	16.87 (12.78)	-2.056	0.042*
ACL	14.52 (13.7)	17.79 (15.47)	-1.115	0.252
BHS	6.42 (4.23)	6.52 (4.32)	-0.115	0.909
SSI	3.56 (5.33)	4.71 (7.16)	-0.932	0.353
QOL G1F	3.29 (0.8)	2.88 (0.81)	2.56	0.012*
QOL G4F	3.29 (0.91)	2.58 (1.07)	3.64	<0.001**
QOL physical	23.10 (4.53)	21 (3.71)	2.58	0.011*
QOL psychological	19.0 (4.14)	16.27 (4.12)	3.37	0.001**
QOL social	12.98 (4.35)	10.88 (3.01)	2.86	0.005**
QOL environmental	26.60 (6.33)	25.79 (4.58)	0.745	0.458
QOL total score	81.67 (13.99)	73.94 (11.75)	3.05	0.003**
GAF	52.01 (13.0)	50.67 (10.0)	0.592	0.555

*p < 0.05; **p < 0.01
Abbreviations: SAIQ = Self-Appraisal of Illness Questionnaire; PANSS = Positive and Negative Syndrome Scale; BIS = Barrett Impulsiveness Scale; BDI = Beck Depression Inventory; ACL = Anxiety Checklist; BHS = Beck Hopelessness Scale; SSI = Scale for Suicide Ideation; QOL = Quality of Life; GAF = Global Assessment of Functioning.

ISSN: 1471-244X