Table 1.

Characteristics of study participants across case and control groups^*

Variables	Case group (n 50)		Control group (n 100)		P
	Mean	sd	Mean	sd
Male					1·00
n	6		12
%	12		12
Age (years)	41·70	10·29	41·67	10·70	0·99
Weight (kg)	67·41	10·03	62·10	8·56	< 0·001
BMI (kg/m2)	26·02	3·47	23·89	2·81	< 0·001
Waist circumference (cm)	87·93	12·41	83·51	7·46	0·007
Smoker					0·007
n	17		15
%	34		15
University education					0·22
n	19		28
%	38		28
Physical activity (MET-h/week)	4·52	2·58	6·71	3·98	< 0·001
Sleep duration (h/d)	7·72	1·76	7·03	1·33	0·01
Time spent sitting (h/d)	5·96	2·56	5·01	1·75	0·008
Dietary supplementation					0·52
n	20		45
%	40		45
Family history of Arthritis					0·009
n	20		20
%	40		20

MET, metabolic equivalent.

^* P values were obtained by the χ ² test and independent samples t test for categorical and continuous variables, respectively.