Table 2.
Comparison of Inpatient and Outpatient 24-Hour Urine Collections in Nonpregnant Healthy Nulligravid Women.a
| Inpatient, n = 60 | Outpatient, n = 74 | P Value | |
|---|---|---|---|
| Age, years | 29.6 (5.0) | 30.8 (4.2) | .13 |
| BMI, kg/m2 | 22.9 (3.6) | 24.3 (5.3) | .11 |
| Cycle day | 8.6 (3.4) | 9.7 (3.4) | .07 |
| Urine volume, mL | 2282.5 (1817-2925) | 2522.5 (1760-3150) | .52 |
| Urine creatinine, mg/dL | 51.1 (41.3-68.4) | 46.6 (34.9-73.8) | .34 |
| Urine protein, mg/dL | 9.5 (7.5-11.5) | 6 (5-8) | <.001 |
| Urine protein: creatinine | 0.19 (0.13-0.28) | 0.13 (0.06-0.21) | <.001 |
| Urine creatinine, mg/24 h | 1257.5 (1098.0-1354.8) | 1146.6 (994.1-1321.4) | .06 |
| Urine protein, mg/24 h | 222.5 (137.2-349.0) | 162.5 (92-252) | .005 |
| >150 mg urine protein/24 h, % | 72 | 55 | .05 |
| >225 mg urine protein/24 h, % | 50 | 31 | .03 |
Abbreviations: BMI, body mass index; IQR, interquartile range; SD, standard deviation.
aTabled values are median (IQR) unless otherwise specified. Age, BMI, and cycle day are reported as mean (SD), and significance levels are based on 2-sample t tests. Comparisons on continuous urinary outcome variables based on Wilcoxon rank-sum tests. Chi-square tests were used for dichotomous outcomes.