Persistent social inequality in medicine use for headache among adolescents in Denmark 1991-2014.

BACKGROUND: Socioeconomic variation in adolescents' medicine use behaviour is an understudied issue. OBJECTIVES: To examine the association between socioeconomic background and medicine use for headache among adolescents, and how this association changes over time. METHODS: Data stem from the Danish part of the international Health Behaviour in School-aged Children (HBSC) study 1991-2014 with data about parents' occupational social class (OSC) and self-reported medicine use for headache, n = 26,685. This study examined absolute social inequality (percent difference between high and low OSC) and relative social inequality (odds ratio for medicine use by OSC). RESULTS: In total, 40.5% used medicine for headache in the past month. There was a significant increase from 32.3% in 1991 to 42.8% in 2002 (test for trend, p < 0.0001) and very little change 2002-2014. This pattern was similar in high, middle and low OSC. The prevalence of medicine use for headache in high, middle and low OSC was 36.2%, 41.5% and 44.8% (p < 0.0001). The OR (95% CI) for medicine use was 1.25 (1.18-1.324) in middle and 1.43 (1.33-1.54) in low OSC. CONCLUSIONS: Medicine use for headache increased 1991-2002 and remained stable 2002-2014. There was increasing medicine use for headache with decreasing OSC; this social inequality was persistent 1991-2014.

Importance of implementation level when evaluating the effect of the Hi Five Intervention on infectious illness and illness-related absenteeism.

BACKGROUND: There is limited research on the importance of implementation when evaluating the effect of hand hygiene interventions in school settings in developed countries. The aim of this study was to examine the association between an implementation index and the effect of the intervention. The Hi Five Intervention was evaluated in a 3-armed cluster randomized controlled trial involving 43 randomly selected Danish schools. METHODS: Analyses investigating the association between implementation of the Hi Five Intervention and infectious illness days, infectious illness episodes, illness-related absenteeism, and hand hygiene were carried out in a multilevel model (school, class, and child). RESULTS: The level of implementation was associated with hand hygiene and potentially associated with number of infectious illness days and infectious illness episodes among children. This association was not found for illness-related absenteeism. CONCLUSIONS: Classes that succeeded in achieving a high level of implementation of the Hi Five Intervention had a lower number of infectious illness days and infectious illness episodes, suggesting that the Hi Five Intervention, if implemented adequately, may be relevant as a tool to decrease infectious illness in a Danish school setting.

Effect Evaluation of a Randomized Trial to Reduce Infectious Illness and Illness-related Absenteeism Among Schoolchildren: The Hi Five Study.

BACKGROUND: Previous school-based hand hygiene interventions have reported to successfully reduce infectious illness among schoolchildren. But few studies have tested the effect in large populations with adequate statistical power and analyses. The aim of this study was to evaluate whether a school-based multicomponent intervention to improve handwashing among schoolchildren, the Hi Five study, succeeded in reducing infectious illness and illness-related absenteeism in schools. METHODS: The Hi Five study was a three-armed cluster-randomized controlled trial involving 43 randomly selected Danish schools; two intervention arms involving 14 schools each, and 15 control schools. Infectious illness days, infectious illness episodes and illness-related absenteeism were estimated in multilevel regressions, based on available cases of text messages answered by parents and based on questionnaire data reported by schoolchildren, respectively. RESULTS: At follow-up, children in the intervention schools did not differ from the control schools in number of illness days [odds ratio (OR)I-arm I: 0.91 (0.77-1.07) and ORI-arm II: 0.94 (0.79-1.12)] and illness episodes [ORI-arm I: 0.95 (0.81-1.11) and ORI-arm II: 0.98 (0.84-1.16)] or in reporting illness-related absenteeism [ORI-arm I: 1.09 (0.83-1.43) & ORI-arm II: 1.06 (0.81-1.40)]. CONCLUSIONS: The multicomponent Hi Five intervention achieved no difference in the number of illness days, illness episodes or illness-related absenteeism among children in intervention schools compared with control schools. It is noteworthy that one of the main components in the intervention, a mandatory daily handwashing before lunch, was only implemented by 1 of 3 of teachers in intervention schools.

Agreement between children and parents demonstrated that illness-related absenteeism was validly reported by children.

OBJECTIVES: To examine the agreement between children's and parents' reporting of illness-related absenteeism from school and to examine predictors for disagreement between children and parents. STUDY DESIGN AND SETTING: A total of 8,438 schoolchildren aged from 5 to 15 years (grade 0-8) and one parent of each child were invited to participate in the Hi Five baseline study. The response rate for children answering a questionnaire was 89% (n = 7,525), and 36% of the parents (n = 3,008) participated in a weekly illness registration study using text messages (short message service) over a period of 22 weeks. Text messages and questionnaire data were linked at the individual level, leaving 2,269 child-parent pairs in the analysis, corresponding to 27% of the eligible sample. RESULTS: The agreement between children's and parents' reports of illness-related absenteeism was good, with high absolute agreement and slight to moderate Ƙ values. Agreement was lowest for 6- to 8-year-olds and highest for 11- to 12-year-olds. Children's reports of illness symptoms and parents' reports of their children's illnesses in the preceding week were strong predictors for children reporting illness-related absenteeism when parents did not. CONCLUSION: Illness-related absenteeism can be reported by children, and children report higher prevalence of illness-related absenteeism than parents.

The Hi Five study: design of a school-based randomized trial to reduce infections and improve hygiene and well-being among 6-15 year olds in Denmark.

BACKGROUND: Infectious illnesses such as influenza and diarrhea are leading causes of absenteeism among Danish school children. Interventions in school settings addressing hand hygiene have shown to reduce the number of infectious illnesses. However, most of these studies include small populations and almost none of them are conducted as randomized controlled trials. The overall aim of the Hi Five study was to develop, implement and evaluate a multi-component school-based intervention to improve hand hygiene and well-being and to reduce the prevalence of infections among school children in intervention schools by 20% compared to control schools. This paper describes the development and the evaluation design of Hi Five. METHODS/DESIGN: The Hi Five study was designed as a tree-armed cluster-randomized controlled trial. A national random sample of schools (n = 44) was randomized to one of two intervention groups (n = 29) or to a control group with no intervention (n = 15). A total of 8,438 six to fifteen-year-old school children were enrolled in the study. The Hi Five intervention consisted of three components: 1) a curriculum component 2) mandatory daily hand washing before lunch 3) extra cleaning of school toilets during the school day. Baseline data was collected from December 2011 to April 2012. The intervention period was August 2012 to June 2013. The follow-up data was collected from December 2012 to April 2013. DISCUSSION: The Hi Five study fills a gap in international research. This large randomized multi-component school-based hand hygiene intervention is the first to include education on healthy and appropriate toilet behavior as part of the curriculum. No previous studies have involved supplementary cleaning at the school toilets as an intervention component. The study will have the added value of providing new knowledge about usability of short message service (SMS, text message) for collecting data on infectious illness and absenteeism in large study populations. TRIAL REGISTRATION: Current Controlled Trials ISRCTN19287682 , 21 December 2012.