|Demographics and clinical characteristics of PNS cohort (as per PNS_1 criteria)|
|PNS||Non-PNS||F, χ 2or t,|
|Age at entry, years||22.0±4.0||22.9±4.1||t=1.29, .195|
|Gender (m/f)||30/14||82/32||χ2 =0.216, .697|
|DUI, weeks b||286.9±273.3||254.7±260.1||t=−0.679, .498|
|DUP, weeks b||42.3±56.3||47.7±110.4||t=0.305, .761|
|Prodromal period b||104.3±178.3||90.1±159.2||t= −0.478, .634|
|1st assessment||40.0±12.7||47.0±14.5||t=2.403, .018*|
|Month 12||54.2±14.9||67.5±14.4||t=4.233, <.001*|
|1st assessment||40.0±17.6||27.5±15.5||t=−4.335, <.001*|
|Month 3||33.1±13.0||18.6±11.5||t=−6.594, <.001*|
|Month 12||33.7±14.5||15.6±11.1||t=−7.961, <.001*|
|1st assessment||31.2±12.4||31.6±13.7||t=−0.153, .878|
|Month 3||6.7±7.2||4.2±5.4||t=−2.320, .047*|
|Month 12||6.6±6.9||6.8±12.4||t= .103, .918|
|1st assessment||5.3±4.8||4.9±5.3||t=−0.347, .729|
|Month 3||1.9±3.0||2.0±3.1||t=0.296, .768|
|Month 12||1.6±2.8||1.5±2.9||t=−0.314, .754|
DUP= duration of untreated psychosis (from first episode to date of entry to PEPP); DUI=duration of untreated illness; SANS= Scale for the Assessment of Negative Symptoms; SAPS= Scale for the Assessment of Positive Symptoms; SOFAS = Social and Occupational.
a Hollingshead Parental Socio-Economic Status, in which 1 = highest and 5 = lowest.
b Analyses were made with transformed data but values are presented in raw form.
Note: Secondary negative symptoms were removed from analyses.
Data presented as mean ± SD (χ2or t, p-value).
Hovington et al. BMC Psychiatry 2012 12:224 doi:10.1186/1471-244X-12-224