| E.1 Medical condition or disease under investigation | 
| E.1.1 | Medical condition(s) being investigated  | 
| depressive symptoms, poor physical functioning. | 
 
| depressieve symptomen, verminderd fysiek functioneren | 
 
 
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| E.1.1.1 | Medical condition in easily understood language  | 
| depressive symptoms, poor physical functioning | 
 
| depressieve symptomen, verminderd lichamelijk functioneren | 
 
 
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| E.1.1.2 | Therapeutic area  | Not possible to specify | 
| MedDRA Classification | 
| E.1.3 | Condition being studied is a rare disease  |  No  | 
| E.2 Objective of the trial | 
| E.2.1 | Main objective of the trial  | 
The primary objective of the D-Vitaal trial is to answer the following two questions: 1. Does vitamin D supplementation decrease depressive symptoms in older persons? 2. Does vitamin D supplementation improve physical performance and decrease functional limitations in older persons? 
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Het primaire doel van de D-Vitaal studie is het beantwoorden van de volgende twee vragen: 1. Kan vitamine D suppletie depressieve symptomen verminderen bij 60-plussers? 2. Kan vitamine D suppletie het fysiek functioneren verbeteren en lichamelijke beperkingen verminderen bij 60-plussers? 
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| E.2.2 | Secondary objectives of the trial  | 
Secondary objectives:  investigate whether: - vitamin D supplementation decreases anxiety and improves cognition and quality of life in older persons - vitamin D supplementation prevents the development of full-blown major depression in older persons - vitamin D supplementation is a cost-effective strategy in the prevention of increasing depressive symptoms and functional limitations and declining physical performance. | 
 
Secundaire studiedoelen: Er zal worden bekeken of: - vitamine D suppletie angst vermindert en cognitie en kwaliteit van leven verbetert bij 60-plussers - vitamine D suppletie full-blown depressie kan voorkomen bij 60-plussers - vitamine D suppletie een kosteneffectieve strategie is voor de preventie van de verergering van depressieve symptomen en lichamelijke beperkingen en de achteruitgang van het fysiek functioneren. | 
 
 
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| E.2.3 | Trial contains a sub-study  |  No  | 
| E.3 | Principal inclusion criteria  | 
- age 60-80 years - mild depressive symptoms - at least one functional limitation - serum 25(OH)D levels between 15 and 50 nmol/l (winter) or 15 and 70 nmol/l (summer) - ability to comply with the study | 
 
- leeftijd 60-80 jaar - milde depressieve symptomen - ten minste één lichamelijke beperking - serum 25(OH)D levels tussen de 15 en 50 nmol/l (winter) of 15 en 70 nmol/l (zomer) - in staat om aan het studieprotocol te houden | 
 
 
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| E.4 | Principal exclusion criteria | 
- full-blown depressive disorder - use of antidepressants - vitamin D (more than 400 IU/day) or calcium (more than 1000 mg/day) supplementation - major life-threatening illness - living in an aged-people's home or nursing home | 
 
- diagnose depressie - gebruik van antidepressiva - vitamine D meer dan 400 IE/dag) of calcium (meer dan 1000 mg/dag) suppletie - ernstige, terminale ziekte - woonachtig in een verzorgingshuis of verpleeghuis 
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| E.5 End points | 
| E.5.1 | Primary end point(s) | 
- change in CES-D score (depression questionnaire) - change in physical performance score - change in the number as well as the degree of functional limitations | 
 
- verandering in CES-D score (depressievragenlijst) - verandering in score op fysiek functioneren - verandering in het aantal en de mate van lichamelijke beperkingen | 
 
 
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| E.5.1.1 | Timepoint(s) of evaluation of this end point | 
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| E.5.2 | Secondary end point(s) | 
- change in anxiety, cogniton and quality of life scores - incidence of full-blown depression - change in timed-up-and-go test score - costs | 
 
- verandering in scores op angst, cognitie, kwaliteit van leven - incidentie van depressiediagnose - verandering in score op de timed-up-and-go test - kosten | 
 
 
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| E.5.2.1 | Timepoint(s) of evaluation of this end point | 
| 6 months, 12 months | 
 
| 6 maanden, 12 maanden | 
 
 
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| E.6 and E.7 Scope of the trial | 
| E.6 | Scope of the trial | 
| E.6.1 | Diagnosis |  No  | 
| E.6.2 | Prophylaxis |  Yes  | 
| E.6.3 | Therapy |  No  | 
| E.6.4 | Safety |  No  | 
| E.6.5 | Efficacy |  Yes  | 
| E.6.6 | Pharmacokinetic |  No  | 
| E.6.7 | Pharmacodynamic |  No  | 
| E.6.8 | Bioequivalence |  No  | 
| E.6.9 | Dose response |  No  | 
| E.6.10 | Pharmacogenetic |  No  | 
| E.6.11 | Pharmacogenomic |  No  | 
| E.6.12 | Pharmacoeconomic |  No  | 
| E.6.13 | Others |  No  | 
| E.7 | Trial type and phase | 
| E.7.1 | Human pharmacology (Phase I) |  No  | 
| E.7.1.1 | First administration to humans |  No  | 
| E.7.1.2 | Bioequivalence study |  No  | 
| E.7.1.3 | Other |  No  | 
| E.7.1.3.1 | Other trial type description |  | 
| E.7.2 | Therapeutic exploratory (Phase II) |  No  | 
| E.7.3 | Therapeutic confirmatory (Phase III) |  Yes  | 
| E.7.4 | Therapeutic use (Phase IV) |  No  | 
| E.8 Design of the trial | 
| E.8.1 | Controlled |  Yes  | 
| E.8.1.1 | Randomised |  Yes  | 
| E.8.1.2 | Open |  No  | 
| E.8.1.3 | Single blind |  No  | 
| E.8.1.4 | Double blind  |  Yes  | 
| E.8.1.5 | Parallel group |  Yes  | 
| E.8.1.6 | Cross over  |  No  | 
| E.8.1.7 | Other |  No  | 
| E.8.2 |  Comparator of controlled trial | 
| E.8.2.1 | Other medicinal product(s) |  No  | 
| E.8.2.2 | Placebo  |  Yes  | 
| E.8.2.3 | Other |  No  | 
| E.8.2.4 | Number of treatment arms in the trial | 2 | 
| E.8.3 | 
                                The trial involves single site in the Member State concerned
                             |  Yes  | 
| E.8.4 |  The trial involves multiple sites in the Member State concerned  |  No  | 
| E.8.5 | The trial involves multiple Member States |  No  | 
| E.8.6 Trial involving sites outside the EEA | 
| E.8.6.1 | Trial being conducted both within and outside the EEA |  No  | 
| E.8.6.2 | Trial being conducted completely outside of the EEA |  No  | 
| E.8.7 | Trial has a data monitoring committee |  Yes  | 
| E.8.8 | 
                        Definition of the end of the trial and justification where it is not the last
                        visit of the last subject undergoing the trial
                     | 
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| E.8.9 Initial estimate of the duration of the trial | 
| E.8.9.1 | In the Member State concerned years | 2 | 
| E.8.9.1 | In the Member State concerned months | 0 | 
| E.8.9.1 | In the Member State concerned days | 0 |