Using the Satisfaction with Life Scale in People with Parkinson’s Disease: A Validation Study in Different European Countries

Table 2

Known groups comparisons and discriminant validity results. 𝑛=350.

	SWLS: score; mean (sd^1)	𝑡-test, df^2; 𝑃 value
Known groups
Gender
Male	21.6 (7.0)	1.680, 348; 0.089
Female	20.4 (6.2)
Group age
<65 years	19.5 (6.7)	−3.398, 345; 0.001
≥65 years	22.0 (6.5)
Marital status: 𝑛 (%)
Other	20.0 (6.5)	−1.500, 345; 0.135
Married	21.4 (6.7)
Education: 𝑛 (%)
Primary school or less	20.3 (6.6)	−0.924, 346; 0.356
Secondary school and higher	21.2 (6.7)
Discriminant validity comparisons
Self-reported health
Healthy	23.0 (6.5)	4.517, 346; <0.001
Ill/unhealthy	19.8 (6.5)
Self-reported disability
No	23.5 (6.3)	2.717, 346; 0.007
Yes	20.7 (6.6)
Disability effect in life
Mildly and moderately	22.7 (6.4)	5.363, 308; <0.001
Severely and profoundly	18.6 (6.3)

1sd: standard deviation, ²df: degrees of freedom.