Review Article

Twenty Years of Schizophrenia Research in the Northern Finland Birth Cohort 1966: A Systematic Review

Table 2

Predictors of poor outcomes in schizophrenia in the Northern Finland Birth Cohort 1966.

Definition of poor outcomePredictor of poor outcome

Poor clinical outcomes
(i) More hospitalizations, rehospitalization after first episode [2530]Family history of psychosis 
Sociodemographic factors: father’s high social class  
Childhood development: earlier age of learning to stand or walk 
Illness-related factors: insidious mode of illness onset, suicidal ideations at first episode, short first hospitalization, long DUP in short-term, and short DUP in long-term 
Brain morphology: reduced density of the left limbic area
(ii) More symptoms, lack of remission [27, 29, 31, 32]Adolescence factors: smoking at age 14 years, poorer school performance at high school 
Illness-related factors: earlier age at onset, poor work adjustment at illness onset, single at illness onset, psychosocial stressor before illness onset, and more symptoms at first episode  
Temperament traits: lower reward dependence and persistence 
Brain morphology: decreased white matter volume
(iii) Treatment resistance [33]Higher birth length and weight

Poor social outcomes
(i) Poor occupational functioning 
(ii) Disability pension 
(iii) Low score on SOFAS [25, 29, 32, 34, 35]
Childhood and adolescence factors: lack of friends at childhood, poorer school performance at high school  
Illness-related factors: earlier age of illness onset, single at illness onset 
Temperament traits: lower persistence and higher harm avoidance 
Brain morphology: reduced density of the grey matter in left frontal lobe and left limbic area

DUP = duration of untreated psychosis, SOFAS = Social and Occupational Functioning Assessment Scale.