Table 1 Description of scenario analyses

Scenario 1: 100% of both high SB group and moderate SB group reduce daily sitting time to < 4 h per day; i.e. average reduction of 6 h of sitting per day in high SB group; and average reduction of 2.8 h per day in moderate SB group

Scenario 2: 30% of high SB group moved to moderate SB, i.e. average reduction of 1.4 h per day

Scenario 3: 30% of moderate SB group moved to low SB group, i.e. average reduction of 0.85 h per day

Scenario 4: A threshold analysis to estimate the numbers of persons in both the moderate and high SB groups required to reduce their sitting time by 36.3 min to achieve same health benefits as in scenarios 2 and 3

SB: sedentary behaviour; High SB: sitting > 8 h daily; Moderate SB group: sitting between 4 – 8 h sitting daily; Low SB group: sitting < 4 h daily