Association of Watson-based humanistic fast track surgery with stoma colorectal cancer recovery: A propensity matched study

Table 6 Subgroup analysis of the effect of Watson-fast track surgery on time to first flatus

Subgroup	n (Int/Con)	Adjusted beta (95%CI)	P value	P for interaction
Overall matched cohort	125/125	-15.2 (-18.4 to -12.0)	< 0.001	Reference
Age (years)				0.784
< 65	74/76	-15.4 (-18.9 to -11.9)	< 0.001
≥ 65	51/49	-14.8 (-19.2 to -10.4)	< 0.001
Surgical approach				0.412
Laparoscopic	95/94	-15.6 (-19.1 to -12.1)	< 0.001
Open	30/31	-13.9 (-18.2 to -9.6)	< 0.001
Stoma type				0.521
Permanent	50/49	-16.2 (-19.8 to -12.6)	< 0.001
Temporary	75/76	-14.5 (-18.1 to -10.9)	< 0.001

Data are derived from the propensity score-matched cohort. Int/Con: Intervention group (Watson-fast track surgery)/control group (routine care). The adjusted beta represents the mean difference in time to first postoperative flatus (in hours), estimated via multivariable linear regression adjusting for baseline covariates. A negative Beta indicates a shorter recovery time for the Watson-fast track surgery group. The P for interaction assesses whether the magnitude of the intervention effect differs significantly across the strata of each subgroup. CI: Confidence interval.