Table 2. Descriptive characteristics of the individual participant dataset comprising data from n=22 cohort studies.

		N	n	%	Mean	SD
Total		22	632 643
Occupational physical activity*	Sedentary	22	217 504	34
	Low	22	227 453	36
	Medium	22	130 524	21
	High	22	55 242	9
Leisure-time physical activity*	Sedentary	22	123 311	19
	Low	22	304 905	48
	Medium	22	157 357	25
	High	22	47 056	7
Education level	Low	21†	129 736	21
	Medium	21†	309 613	50
	High	21†	181 528	29
Gender	Men	22	320 523	51
	Women	22	311 714	49
Smoking	No	22	404 430	64
	Yes	22	224 179	36
Age (years)		22			43.1	7.9
BMI (kg/m2)		22			25.2	3.8

^*Physical activity levels (during work and at leisure time) reflect the physical activity continuum, ie, sedentary, low, moderate and high. For leisure-time physical activity, these categories roughly indicate: spending most leisure time sitting (sedentary), occasionally engaging in light intensity physical activities during leisure time such as slow walking or household activities (low), engaging in physical activities of moderate intensity such as intense household activities or brisk walking (moderate), regular engagement in high intensity physical activities such as jogging or cycling, thereby meeting physical activity guidelines (high). For occupational physical activity, categories roughly indicate: mainly sitting work (sedentary), work that mainly involves standing or walking, but without lifting or carrying loads (low), work that involves carrying light objects or walking stairs (moderate), highly physically demanding works involving frequent carrying or lifting heavy loads (high).

^†No data on this metric provided by Primary Prevention Study.29

BMIbody mass indexNnumber of studies from which this variable is availablennumber of participants