Correlational finding on Happiness and subject: Current general mental health

StudyVanBeuningen & Moonen (2013a): study NL 2007
TitleGezondheid Belangrijker voor Geluk dan Leefstijl. (Health More Important for Happiness then Lifestyle.)
SourceBevolkingstrends, Central Bureau for Statistics (CBS), April 2013, the Hague, Netherlands
Public18+ aged, general public, Netherlands, 2007,2008,2009
SampleProbability sample (unspecified)
Respondents N =27358

Author's labelMental health
Page in Source 4,8
Our classificationCurrent general mental health
Selfreport on mental health (full question not 
0     very bad
100  very good
happiness reversed scale; (1,2) happy, (3,4,5) not 

Observed Relation with Happiness
O-HP-u-sq-v-5-dr=+.31 p < .01
males   r = +.29
females r = +.33
18 to 25 years:    r = 0,27
25 to 45 years:    r = 0,31
45 to 65 years:    r = 0,32
65 years or older: r = 0,31
O-HP-u-sq-v-5-dOR=1,07 p < .01
sexe  or = 0,96
O-HP-u-sq-v-5-dOR=1,07 p < .01
Age 18-25 vs. 65 plus  or = 0,61

Appendix 1: Happiness measures used
CodeFull Text
O-HP-u-sq-v-5-dSelfreport on single question:

To what extent do you think of yourself as a happy person?
5 very happy
4 happy
3 neither happy nor unhappy
2 unhappy
1 very unhappy
- don't know

Appendix 2: Statistics used
OROR: Odds ratio in binary logistic regression.

Happiness is a binary or dichotomous variable with Happy =1 and Unhappy=0.

OR < 1 indicates that the odds of being happy-to-being unhappy
decreases by a factor OR when

1) the corresponding metric correlate increases by one unit
2) the corresponding category of a categorical correlate is compared to the reference category.

OR > 1 indicates an increase by a factor OR for both the above cases.
rPRODUCT-MOMENT CORRELATION COEFFICIENT (Also "Pearson's correlation coefficient' or simply 'correlation coefficient')
Type: test statistic.
Measurement level: Correlate: metric, Happiness: metric
Range: [-1; +1]

r = 0 no correlation ,
r = 1 perfect correlation, where high correlate values correspond with high happiness values, and
r = -1 perfect correlation, where high correlate values correspond with low happiness values.
Ruut Veenhoven, World Database of Happiness, Collection of Correlational Findings, Erasmus University Rotterdam.