Joint predictability of health related quality of life and leisure time physical activity on mortality risk in people with diabetes

Table 4 Characteristics of participants according to SF-36 physical component summary scores (PCS) and stratified by level of leisure time physical activity

	Leisure time physical activity
	Inactive			Intermediate			Regular
	PCS	PCS		PCS	PCS		PCS	PCS
	(High)	(Low)		(High)	(Low)		(High)	(Low)
			P-value^a			P-value^a			P-value^a
N	148	157		124	126		79	67
PCS
First quartile (Q1)	49.1	17.3		49.0	21.9		50.0	23.7
Second quartile (Q2)	52.0	28.0		51.6	31.2		52.5	32.9
Third quartile (Q3)	54.3	36.2		54.5	38.8		54.4	40.2
Age (years)	53.8 ± 0.83	65.2 ± 0.89	<0.001	59.3 ± 1.03	64.1 ± 0.96	0.001	57.7 ± 1.25	63.6 ± 1.30	0.001
Sex (% female)	39.9	54.8	0.009	50.8	54.0	0.617	30.4	43.3	0.106
Education			<0.0001			0.042			<0.001
≥ 0 and <7 years	57.5	80.3		51.6	64.3		27.8	59.7
≥ 7 years	42.5	19.7		48.4	35.7		72.2	40.3
Smoking (% current)	37.2	22.3	0.004	19.4	14.3	0.284	22.8	17.9	0.468
Body mass index (kg/m²)	24.9 ± 0.30	25.3 ± 0.42	0.491	25.2 ± 0.37	25.1 ± 0.37	0.768	25.1 ± 0.39	25.0 ± 0.54	0.899
Duration of diabetes (years)	5.1 ± 0.45	9.0 ± 0.71	<0.001	6.5 ± 0.65	9.1 ± 0.74	0.008	5.6 ± 0.58	9.1 ± 1.11	0.006
Using insulin (% yes)	12.2	22.6	0.017	8.9	14.3	0.181	6.4	17.9	0.032
Heart disease (% yes)	14.6	34.7	<0.001	11.8	37.6	<0.001	19.0	31.3	0.084
Hypertension (% yes)	34.0	51.0	0.003	33.9	57.6	<0.001	36.7	55.2	0.025
Dyslipidaemia (% yes)	32.4	37.9	0.338	40.0	39.5	0.935	28.9	54.0	0.003
Stroke (% yes)	2.0	9.7	0.005	1.6	16.8	<0.001	2.5	7.5	0.165

^aContinuous variables were compared using the Student’s t-test and shown as means ± standard errors. Categorical variables were compared using Pearson’s chi-square test and shown as a percentage of the total.

ISSN: 1471-2458