# Correlational findings

## Study Chen et al. (2005): study JP 1999

Public
9-10 aged children followed 3 years, Japan 1999-2002
Survey name
JP-Toyama Birth Cohort Study
Sample
Respondents
N = 7794
Non Response
14,4%
Assessment
Questionnaire: Paper & Pencil Interview (PAPI)

## Correlate

Authors's Label
Television viewing
Our Classification
Error Estimates
T1-T2 correspondence r=+,23
Remarks
Assessed at T1 and T2 with 3 year difference
Distribution
N= 1:1988(25,5)%;  2: 3008 (38,6)%; 3:2798(35,9)%
Operationalization
Self report on question on hours television viewing:
1: <2h
2: 2-3h
3: ≥3h

## Observed Relation with Happiness

Happiness Measure Statistics Elaboration / Remarks O-QOL-cm-sq-v-5-a = - p < .05 T1 <2h TV watching by T2 happiness

vs 2-3h          OR = 1,02 CI95[0,91-1,14]
vs ≥3h           OR = 1,24 CI95[1,10-1,39]
OR no controls
O-QOL-cm-sq-v-5-a = - p < .05 vs 2-3h          OR = 0,99 CI95[0,88-1,12]
vs ≥3h           OR = 1,22 CI95[1,07-1,38]
OR controlled for
- age
- sexe
- T1 BMI
O-QOL-cm-sq-v-5-a = +/- p < .05 vs 2-3h          OR = 0,98 CI95[0,86-1,10]
vs ≥3h           OR = 1,15 CI95[1,01-1,31]

- Preference for physical activity
- Frequency of physical activity
- breakfast eating
- Bedtime
- Sleep duration
- age
- sexe
- T1 BMI
O-QOL-cm-sq-v-5-a = - T1 TV watching  by T2 happiness
%happy  %unhappy difference
- <2h              43,6    56,4      -12,8
- 2-3h             43,2    56,8      -13,6
- ≥3h              38,4    61,6      -23,2
O-QOL-cm-sq-v-5-a = - - <2h to <2 h      44,7     55,3     -10,6
- <2h to ≥2 h      41,4     58,6      -17,2
- ≥2h to <2 h      42,5     57,5      -15,0
- ≥2h to ≥2 h      39,4     60,6      -21,2
O-QOL-cm-sq-v-5-a = - p < .05 T1-T2 CHANGE TV watching by T2 happiness

Remained <2h TV watching often
vs <2h to ≥2 h    OR =1,15 CI95[0,95-1,39]
vs ≥2h to <2 h    OR =1,10 CI95[0,96-1,25]
vs ≥2h to ≥2 h    OR= 1,24 CI95[1,09-1,42]
OR not controlled
O-QOL-cm-sq-v-5-a = - p < .05 T1-T2 CHANGE TV watching by T2 happiness

Remained <2h TV watching
vs <2h to ≥2 h   OR =1,15 CI95[0,94-1,41]
vs ≥2h to <2 h   OR =1,06 CI95[0,92-1,22]
vs ≥2h to ≥2 h   OR= 1,22 CI95[1,06-1,40]
OR controled for
- age
- sexe
- T1 BMI
O-QOL-cm-sq-v-5-a = - p < .05 vs <2h to ≥2 h   OR =1,07 CI95[0,86-1,34]
vs ≥2h to <2 h   OR =1,09 CI95[0,94-1,25]
vs ≥2h to ≥2 h   OR= 1,20 CI95[1,03-1,39]
OR controled for