====== Blue Light (BLUQ) ======

Blue Light/BLUQ is the name of an [[additional assessments|additional questionnaire]] initiated by the National Institute for Public Health and the Environment [[https://www.rivm.nl/|(RIVM)]].\\
BLUQ assessed the evening use of blue light-emitting devices in [[children]] (8-17 years old) using a self-report questionnaire, enabling the investigation of its effects on health (e.g., sleep patterns, concentration at school).\\ 
BLUQ was part of a shifwork- and blue light-related research project that included a second additional questionnaire called [[SHIQ|Shiftwork]].\\
The Blue Light variables are available for use for all researchers and can be requested through the catalogue. Questions to the contact person of the additional questionnaire can be asked through Lifelines (e-mail data@lifelines.nl).

==== Protocol ====

The BLUQ questionnaire was sent out in the spring of 2018.
Parents of young Lifelines participants (between 8-17 years) received the questionnaire and were asked to help their child fill in the questionnaire (children aged 8-12) or to forward it to their child and ask her/him to fill in the questionnaire (children aged 13-17).\\

==== Response ====

~3.600 [[cohort|participants]] aged 8-12 were invited for BLUQ. The response rate was 21%.\\
~4.200 [[cohort|participants]] aged 13-18 were invited for BLUQ. The response rate was 16%.\\

==== Publications using BLUQ data ====

The results from BLUQ were used in a {{ :qblu_report.pdf |report}} on screen use, blue light exposure and sleep quality in children (written in Dutch).


==== Variables ====

The following instruments were used to assess chronotype and sleep quality:

  * [[Chronotype (CCTQ)|Children's ChronoType Questionnaire]]
  * [[Sleep quality (PSQI <18)|Pittsburg Sleep Quality Index]]
  * [[Sleep reduction (CSRQ)|Chronic Sleep Reduction Questionnaire]]

In addition, the questionnaire a large number of questions about screen use and blue light exposure, which can be found in the subsection [[Screen use (<18)]] (101 items for children/93 items for adolescents). Furthermore, it was asked who filled in the questionnaire, see [[personal_data_18]].