Table 2.

Results of binary logistic regression predicting parent's interest (i.e. showed their interest in intervention by positive response on reply card) and participation (i.e. completed online assessment) in a physical activity intervention delivered through the Internet

MODEL 1	Showing interest a (all groups, n = 2637)					participation b (interested, n = 300)
	n	n interested (%)	adjusted OR	95% CI	P	n	n participated (%)	adjusted OR	95% CI	P
Gender
male	1427	128 (9.0)	1.00c			128	48 (37.5)	1.00c
female	1210	172 (14.2)	1.68	1.31–2.16	<0.001	172	101 (58.7)	2.27	1.39–3.70	0.001
SES
low	879	47 (5.3)	1.00c			47	14 (29.8)	1.00c
medium	1489	213 (14.3)	2.87	2.07–3.99	<0.001	213	121 (56.8)	3.17	1.58–6.34	0.001
high	269	40 (14.9)	3.42	2.18–5.37	<0.001	40	14 (35.0)	1.65	0.65–4.19	0.293
PA
not-active	1908	216 (11.3)	1.00c			216	106 (49.1)	1.00c
active	729	84 (11.5)	0.93	0.71–1.22	0.584	84	43 (51.2)	0.92	0.54–1.57	0.766
MODEL 2	Showing interest a (all groups, n = 2976)					participation b (interested, n = 317)
	n	n interested (%)	adjusted OR	95% CI	P	n	n participated (%)	adjusted OR	95% CI	P
Gender
male	1452	128 (8.8)	1.00c			128	48 (37.5)	1.00c
female	1524	189 (12.4)	1.70	1.34–2.17	<0.001	189	112 (59.3)	2.38	1.49–3.80	<0.001
Employed
no	339	17 (5.0)	1.00c			17	11 (64.7)	1.00c	0.53–1.46	0.626
yes	2637	300 (11.4)	3.03	1.81–5.06	<0.001	300	149 (49.7)	0.88
PA
not-active	2204	229 (10.4)	1.00c			229	114 (49.8)	1.00c
active	772	88 (11.4)	0.94	0.72–1.22	0.630	88	46 (52.3)	0.77	0.27–2.19	0.619

Note:

^a including group 1, 2, 3, 4, 5

^b excluding group 4&5

^c Reference group

CI = confidence interval; PA = Physical activity; SES = Socio-economic status (based on occupation); adjusted OR = odds ratio adjusted for gender, SES/employment and physical activity; CI = confidence interval; PA = Physical activity