| Study | Mujcic & Oswald (2016): study AU 2007 |
| Title | Evolution of Well-Being and Happiness After Increases in Consumption of Fruit and Vegetables. |
| Source | American Journal of Public Health, 2016, Vol 106, 1504 - 1510 |
| URL | https://www.ncbi.nlm.nih.gov/pubmed/27400354 |
| DOI | doi: 10.2105/AJPH.2016.303260. |
| Public | 18+ aged general public, Australia, followed 3 years 2007-2009 |
| Sample | Probability multi-stage cluster sample |
| Non-Response | |
| Respondents N = | 12385 |
| Correlate | |
| Author's label | Change consumption fruits and vegetables |
| Page in Source | table 1 + 2 |
| Our classification | What one eats |
| Operationalization | Selfreported consumption of fruit and vegetables in portions per day in a typical week 1 2 3 4 5 6 or more |
| Observed distribution | M: 3,84; SD: 2,01 |
| Remarks | Change over 3 years: T1: 2007, T2: 2008, T3: 2009 |
| Observed Relation with Happiness | ||
| Happiness Measure | Statistics | Elaboration/Remarks |
| O-SLW-u-sq-n-11-d | b-fix=+.03 p < .002 | CHANGE happiness by CHANGE portions fruits and vegetables CI95 [+0.01, +0.04] no controls Meaning: Change from 1 to 6 servings an day would correspond with a gain of 0,24 on this 0-10 happiness scale |
| O-SLW-u-sq-n-11-d | b-fix=+.03 p < .003 | Controled for set A |
| O-SLW-u-sq-n-11-d | b-fix=+.02 p < .10 | Additionally controled for set B |
| M-TH-cm-sq-v-6-a | b-fix=+.02 p < .003 | CI95 [+.001, - +003) no controls |
| M-TH-cm-sq-v-6-a | b-fix=+.02 p < .02 | Controled for set A |
| M-TH-cm-sq-v-6-a | b-fix=+.02 p < .017 | Additionally controled for set B Control variables SET A - socio-demographic characteristics - age - income - education - employmeent - long-term health condition - number of children under age 4 Control variables SET B - drinking alcohol - smoking - eating behaviors - never eat red meat - never eat fish - drink low fat or skinny milk - avoid fat foods - BMI - regular exercise Granger test suggests that causality runs from nutrition to happiness and not reversedly |
| Code | Full Text |
| M-TH-cm-sq-v-6-a | Selfreport on single question: During the past 4 weeks….. Have you been a happy person? 6 all of the time 5 most of the time 4 a good bit of the time 3 some of the time 2 a little of the time 1 none of the time Item MH5 in SF-36 (Medical Outcome Study 36 item Short Form) |
| O-SLW-u-sq-n-11-d | Selfreport on single question: All things considered, how satisfied are you with your life? Again, pick a number between 0 and 10 to indicate how satisfied you are. 0 totally dissatisfied 1 2 3 4 5 6 7 8 9 10 totally satisfied |
| Symbol | Explanation |
| b-fix | REGRESSION COEFICIENT in fixed effects analysis Type: test statistic WDH symbol: b-fix Primary correlate level: metric Secondary correlate level: nonmetric Happiness level: metric Theoretical range: unlimited Meaning: Variant of usual (non-standardized) regression coefficient (b), which controls for the secondary variables, by focusing on differences from a fixed level, such as the mean in a category. Aims to reduce the residual variance and to improve the precision of the regression coefficient. References: Wikipedia: http://en.wikipedia.org/wiki/Fixed_effects_model Non-technical text: http://www.jblumenstock.com/files/courses/econ174/FEModels.pdf |