Wages

Implementation and data collection occurred over three years. Metrics measured included number of internships obtained, employment rate for students, and pay.

All subjects were followed for 12 months with face-to-face interviews every three months to collect data on primary employment variables and secondary outcomes measured. After this initial 12 months, the follow-up period was extended to 24 months at all sites including telephone interviews every three months. MANCOVAs were used to determine treatment group differences over time on the outcome variables (employment index, perceived barriers to employment, level of disability, quality of life, depression, and sustaining care needs), controlling for specified covariates. This included study site, sex, and age.

Competitive employment was as a primary outcome measure and measured every three months. Competitive employment is "community jobs that pay at least minimum wage (directly by the employer to the employee) that any person can apply for, including full-time and part-time jobs." General rehabilitation outcomes were measured at baseline and 3-month follow-up interviews. Standardized measures used included 1) Alcohol Use Disorders Identification test, 2)The Craig Handicap Assessment and Reporting Technique (CHART), 3) VR-36 that measures health-related quality of life in veterans, and 4) The Quick Inventory of Depressive Symptomatology Self-Report.

Demographic variables were also collected such as age, sec, race/ethnicity, employment history, previous levels of income, educational background, legal history, lifetime employment history, vocational services history, duration of SCI, level of SCE, and type of family structure.

A comparison of individuals who were randomized (n=69) to IPS or the Brokered treatment with those who were not randomized (n=18) reveals no statistically significant demographic differences between the two samples. Similarly the randomized individuals did not differ significantly from those who were not randomized in prior illness indicators or symptom severity at screening.

Those who consented to participate, completed a Workplace Fundamentals Knowledge Test. Afterwards they were randomly assigned to receive supported employment services alone or to receive supported employment services and the supplementary skills training about workplace fundamentals. Individuals were assigned to the group on an average of 56 days after obtaining a job. Among the 35 participants, 18 received treatment as usual (supported employment services alone) the rest were assigned to the receive the work fundamentals training too. Chi square test and t test indicated no significant difference in the two groups. Workplace knowledge was measured with the Workplace Fundamental Knowledge Test scores at baseline and at nine month intervals. Rates of employment for each month of the study period for individuals who recently went to work was documented by control group and workplace fundamentals group. These rates were compared using a generalized estimating equations analysis. The researchers also compared cumulative time worked, wages earned and job tenure for the first and subsequent jobs held. Mann-Whitney tests were used because that data was skewed. Vocational services used were also analyzed with Mann-Whitney tests.

Employment outcomes were aggregated by computing the total number of jobs, hours worked, and wages earned over the entire follow-up period. Potential interactions between site, treatment group, and work were evaluated by performing an analysis of variance (ANOVA), with site and treatment group (supported employment with cognitive training or supported employment alone) as the independent variables and the total number of jobs worked as the dependent variable. A chi-square analysis was conducted to compare the two treatment groups on percentage of patients who obtained work over the course of the follow-up period. Additional analysis was also done to address a variety of data factors.

Comprehensive employment data were collected the first year. Cognitive and psychological assessments were administered at baseline and three months later.
Diagnostic and background information were retrieved from the participants charts, interviews, and staff reports. Employment outcomes were measured through contact with the participants and staff. Seven different tests were used to measure cognitive functions (i.e.. attention and concentration, psychomotor speed, information processing speed, verbal learning and memory, executive functioning and overall cognitive functioning) at baseline and 3 month follow up.
Psychiatric symptoms were measured with interviews using the Positive and Negative Syndrome Scale. Efforts were made to get follow up employment data for the one year following randomization. Intent to treat analyses of the employment outcomes were conducted on the entire randomized sample that had some follow up data (n=44). The statistical analysis included: x2, t test and analyses of covariance. Due to skewed data Mann Whitney U tests were also used.

After acceptance into the study the Positive and Negative Syndrome Scale was conducted. Interviews were also conducted at baseline and then every 6 months over two and half years. Questions related to symptoms, jobs, hospitalizations and more. Program staff tracked job information. Employment data was also provided by staff or through interviews with participants. Each participant was followed for the study period or until he or she exited services. Time based analyses compared weekly employment and job placement rates for participants in each group. Binary employment outcomes were analyzed with generalized estimating equations of the Genmod procedure in SAS with a logit link function. Another group of job based analyses was also conducted to examine average job duration, hours and wages to compare outcomes from participants in the two groups. Spearman rank-order correlations between job duration, hours and wages were estimated to identify potential covariates in the hours and wages test model.

The following techniques were used t-tests, chi-square, logistic regression, and repeated measures ANOVA to analyze the data. Alpha for significance was set at p < .05, and all tests were two-tailed. Cohen's d effect sizes to provide estimates of the magnitude of effects was also calculated.

Both groups were assessed at baseline and 6 months after the conclusion of the intervention. Data about demographics, symptoms, diagnosis and functioning was collected for all participants using a variety of measures. These included the Brief Psychiatric Rating Scale, Structured Clinical Interview for the DSM-IV Axis One Disorders, The Quality of Life Scale and Social and Occupational Functioning Assessment Scale. The Supported Employment Fidelity Scale Implementation questions were used to assess the fidelity of the program. Statistical analysis was conducted using SPSS version 14 for Windows.

Data was collected about job acquisition, hours worked, wage and job retention.