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OSDUS |
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Conducted every odd year since 1977, OSDUS employs a two-stage cluster design involving a random selection of classes from within a random selection of schools (probability proportional to size) stratified by region and school type (elementary/middle or secondary). The 2005 OSDUS Mental Health and Well-Being also states that one-in-12 students (representing 86,200), report multiple problems including psychological distress, hazardous drinking, drug problems and delinquent behaviour. The OSDUS study spans two decades and is based on 14 surveys conducted every two years since 1977. |
OSDUS |
OSDI OSDIA OSDIDBAD OSDIT OSDIU OSDL OSDL OSDLab OSDLP OSDLS OSDM OSDMA OSDMS OSDN OSDOC OSDP OSDPA OSDPD OSDPL OSDPM OSDR OSDS OSDT OSDU OSDUHS OSDUS OSDUYOSDV OSDW OSE OSE OSE OSE OSE OSE/IA OSE1 OSE2 OSEA OSEAL OSEAN Osean Air Defense Force OSEAS OSEB Oseberg Burial Osebne Varovalne Opreme Osebold-Remondini syndrome Osebold-Remondini syndrome OSEC OSECT OSED OSEDA OSEDC OSEDL Osee Osee Osee | |||||
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