Table 5 Comparison of primary and secondary outcomes within 48 h postoperatively after inverse probability of treatment weighting

PONV

0.53 (0.48–0.60)

< 0.001^b

0.82 (0.74–0.91)

< 0.001^b

Severity of PONV

0.25 (0.19–0.34)

< 0.001^b

0.72 (0.58–0.90)

0.004^b

PON

0.77 (0.67–0.88)

< 0.001^b

0.89 (0.83–0.96)

0.004^b

Severity of PON

0.58 (0.43–0.77)

< 0.001^b

0.89 (0.83–0.97)

0.005^b

POV

0.60 (0.53–0.68)

< 0.001^b

0.91 (0.84–0.99)

0.022^b

Severity of POV

0.30 (0.22–0.41)

< 0.001^b

0.84 (0.69–1.03)

0.087

Rescue antiemetic therapy

0.70 (0.62–0.80)

< 0.001^b

0.94 (0.88–1.01)

0.087

Water intake

170.5

(108.5–287.2)

< 0.001^b

249.0

(115.2–420.4)

< 0.001^b