highly significantP < 0.001
The observed nighttime reductions in urine production were highly significant ( P < 0.001) and remarkably similar in the two groups (NC women: daytime: 1.90 ± 0.15 mL/(kg·h), night: 0.86 ± 0.07 mL/(kg·h) and OC users daytime: 1.94 ± 0.12 mL/(kg·h), night: 0.80 ± 0.10 mL/(kg·h).