Table 3.

Fully adjusted generalized linear mixed model estimates of the predictors of exercising inside (vs only outside) or outside (vs only inside) the home environment, and of using digital physical activity (PA) programs (vs not) at follow-up 1 (FU1), follow-up 2 (FU2), and follow-up 3 (FU3).

Predictor		Exercising insidea			Exercising outsidea		Digital PA program useb
		ORc (95% CI)		P value	OR (95% CI)	P value	OR (95% CI)	P value
Timed (reference: FU1)
	FU2		0.51 (0.42-0.62)	<.001	1.23 (0.89-1.70)	.20	0.47 (0.36-0.59)	<.001
	FU3		0.57 (0.47-0.70)	<.001	1.13 (0.81-1.58)	.46	0.50 (0.39-0.64)	<.001
Age (years) (reference: <35 years)
	35-64		0.70 (0.49-1.00)	.048	1.60 (0.78-3.28)	.20	0.24 (0.14-0.40)	<.001
	>64		0.84 (0.54-1.31)	.45	3.44 (1.36-8.71)	.009	0.10 (0.05-0.21)	<.001
Female gender (reference: all other)			1.34 (1.03-1.75)	.03	1.17 (0.68-2.04)	.57	6.91 (4.46-10.71)	<.001
White ethnicity (reference: nonwhite)			0.46 (0.25-0.84)	.01	2.91 (0.89-9.48)	.08	0.51 (0.23-1.15)	.11
High education (reference: <16 years)			0.86 (0.58-1.27)	.45	2.89 (1.31-6.38)	.009	2.56 (1.37-4.76)	.003
Condition limiting PA (reference: none)			1.65 (1.12-2.45)	.01	0.31 (0.14-0.69)	.004	0.75 (0.41-1.34)	.33
England (reference: all other UK countries)			1.16 (0.82-1.65)	.41	0.67 (0.31-1.44)	.31	1.12 (0.65-1.92)	.68
Indoor space (reference: none)			6.12 (4.60-8.13)	<.001	0.56 (0.33-0.95)	.03	12.79 (8.30-19.69)	<.001
Employed (reference: not employed)			1.05 (0.82-1.34)	.72	1.52 (0.96-2.42)	.07	1.33 (0.94-1.87)	.11
BMI			0.97 (0.95-0.99)	.02	0.98 (0.93-1.03)	.37	0.92 (0.89-0.96)	<.001
High perceived risk of COVID-19 (reference: low)			1.30 (1.00-1.69)	.05	0.48 (0.30-0.77)	.002	0.95 (0.65-1.37)	.77
Total isolation (reference: not)			5.08 (2.18-11.82)	<.001	0.01 (0.00-0.03)	<.001	1.36 (0.63-2.95)	.43

^aN=4492 observations, n=1772 individuals.

^bN=4865 cases, n=1780 individuals.

^cOR: odds ratio.

^dTime violated the linearity assumption and was thus entered as a categorical variable.