Validity and reliability of a self-report instrument to assess social support and physical environmental correlates of physical activity in adolescents

Table 4 Factor structure (varimax rotated solution) and reliability of physical environment scale (N = 196)

Factors / Items	h ²	Convenience	Public recreation facilities	Safety	Private sport providers
In the area I live in, shops and businesses can be reached on foot.	0.73	0.85	0.02	0.00	0.13
From where I live, the bus and tram stops can be reached on foot.	0.77	0.87	0.10	0.02	−0.05
In the area I live in, there are sports facilities that are always accessible (e.g. soccer fields).	0.70	−0.06	0.78	0.21	0.21
In the area I live in, there are playgrounds.	0.79	0.18	0.87	−0.02	−0.03
How safe are the public leisure time facilities in the area you live in (in terms of problems with crime)?	0.74	−0.05	−0.05	0.86	−0.01
For walking and riding a bicycle, the area I live in is … “not very nice at all” to “very nice at all”	0.49	0.10	0.32	0.62	0.03
In the area I live in, there are sports clubs.	0.77	−0.04	0.08	0.32	0.81
In the area I live in, there are commercial sport providers (e.g. fitness clubs).	0.75	0.13	0.09	−0.32	0.79
Variance explained (Overall variance explained =71.8%)		19.2%	18.7%	17.1%	16.9%
Rotated eigenvalues		1.53	1.49	1.37	1.35
Internal Consistency (Cronbach’s alpha)		0.64	0.61	0.42	0.48
Test-retest reliability (Intra-Class Coefficients)		0.71	0.74	0.59	0.65

Note: h² = communality; trend of eigenvalues: 1.99; 1.50; 1.24; 1.00; 0.74; 0.55; 0.53; 0.41.

ISSN: 1471-2458