Fig. 4

In 2012, the median OTT was 139 (94–265) minutes. In 2013, it was 101 (65–220) min. The difference was significant (p < 0.001). In this figure quarterly medians with 95 % confidence intervals are presented
In 2012, the median OTT was 139 (94–265) minutes. In 2013, it was 101 (65–220) min. The difference was significant (p < 0.001). In this figure quarterly medians with 95 % confidence intervals are presented