TABLE 1.

Characteristics of participants included in each analysis as well as those excluded from the stratified analysis.

Characteristic	Primary analysis	Stratified analysis		Excluded
	All n = 4254	Frequent worktime sitting n = 863	Infrequent worktime sitting n = 2142	Not working n = 1238
Age (years)	61.1 ± 9.1	59.1 ± 8.8	59.3 ± 8.9	65.5 ± 8.3
BMI (kg/m2)	28.6 ± 4.8	28.6 ± 4.9	28.4 ± 4.8	28.6 ± 4.8
Sex (female)	2459 (58%)	452 (53%)	1257 (59%)	741 (60%)
Leisure-time walking (>1 h/day)	1869 (44%)	353 (41%)	964 (45%)	546 (44%)
Leisure-time sitting
≤4 h/day	2853 (67%)	506 (59%)	1525 (71%)	812 (66%)
≥4 h/day	1401 (33%)	357 (41%)	617 (29%)	426 (34%)

Note: Numbers (n=) represent participants, not knees contributed by those participants. Values are reported as either mean ± SD or n (%).