Physical activity and depressive symptoms in adolescents: a prospective study

Table 1 Characteristics of the sample at baseline.

	N	Percentage adjusted for survey design
Depressive symptoms:
Case on SMFQ	671	24.5
Not a case on SMFQ	2,054	75.5
Physical activity:
None	317	11.5
About 0.5 h	787	28.6
About 1 h	623	22.7
About 2-3 h	609	22.3
About 4-6 h	239	8.7
7 h or more	171	6.2
Sex:
Male	1,356	48.8
Female	1,433	51.1
Year group:
Year 7	1,381	49
Year 9	1,408	51
Ethnicity:
White UK	581	20.8
White other	161	5.9
Bangladeshi	690	25.6
Indian	250	9
Pakistani	184	6.8
Black Caribbean	166	6
Black African	279	10.1
Black British	121	4.3
Mixed ethnicity	193	7
Other	124	4.5
Religious group:
None	325	11.5
Jewish	3	0.1
Christian	994	35.7
Muslim	1,169	42.7
Hindu	101	3.7
Sikh	72	2.7
Agnostic/atheist/don't know	59	2.1
Other	43	1.6
Either parent employed:
Neither	1,004	37.5
At least one	1,681	62.5
Eligibility for free school meals:
Not eligible	1,338	51.9
Eligible	1,217	48.1

ISSN: 1741-7015