Water intake and hydration status in young children in a day care center with locally collected microclimate data on two days with different temperatures

Water intake and hydration status in young children in a day care center with locally collected microclimate data on two days with different temperatures - WATCH

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00033942

Enrollment

Registered

2024-08-19

Start date

2024-09-06

Completion date

Unknown

Last updated

2025-10-06

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

healthy subjects

Interventions

Group 1: This is a one-armed study with two test days and no intervention. Children of the kindergarten participating in this study will be playing outside for 1-3 hours exposed to the weather, as on

Eligibility

Sex/Gender

All

Age

3 Years to 6 Years

Inclusion criteria

Inclusion criteria: Enrolled children of the kindergarten, basic german laguage skills

Exclusion criteria

Exclusion criteria: Acute or chronic diseases with special water needs/ impact of possible dehydration (e.g. cold, cystic fibrosis)

Design outcomes

Primary

Measure	Time frame
body weight (kg, personal scale, before (t0) and after (t1) observational period)	—

Secondary

Measure	Time frame
urine osmolality (mosmol/kg; osmometer), salvia osmolarity (mosmol/l; MX3 Saliva osmometer), voluntary drinking amount (ml; cups with known filling amount/ measuring cylinder), activity (ActiGraph wGT3X-BT), body surface temperature (thermal imaging camera)	—

Countries

Germany

Contacts

Public ContactKathrin Sinningen

Universitätskinderklinik Bochum

Kathrin.Sinningen@rub.de+492345092615

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026