Table 2.

Coding rules to assign Compendium METs, wakefulness, and posture to the ICATUS activities

Coding rule 1	Assign the codes and MET values from the Compendium and the codes for wakefulness and posture to each 6-digit activity
Coding rule 2	Use a median MET estimate of the respective activities or subcategories	2a.	when more than one activity from the Compendium was assigned to a 6-digit activity
		2b.	when assigning METs to a 4-digit and 5-digit activity
		2c.	when an activity is classified as “not further defined” (n.f.d.) or “not elsewhere classified” (n.e.c.)
		2d.	when there is insufficient information in the explanatory notes; usually classified as “other related activities” and ends in “9”
Coding rule 3	Assign the codes for summary wakefulness and posture to a 4-digit and 5-digit activity according to the assessments made for the majority of its 6-digit subclass activities

Notes: Compendium: 2011 Adult Compendium of Physical Activities [63]; MET: metabolic equivalent of task; ICATUS: International Classification of Activities for Time-Use Statistics; n.f.d.: not further defined; n.e.c.: not elsewhere classified