Table 2.
Unadjusted analysis of mortality
| Variable | Dead (n = 55) | Alive (n = 468) | Odds ratio (95% CI) | P-value |
|---|---|---|---|---|
| Age (years)*† | 25 (21–34) | 25 (21–30) | 1.02 (0.98–1.07) | 0.26 |
| Source | 0.0005 | |||
| Operation room | 23 (6.6) | 323 (93.4) | Reference | |
| Outpatient department | 10 (18.9) | 43 (81.1) | 3.26 (1.40–7.17) | |
| Ward | 22 (17.7) | 102 (82.3) | 3.03 (1.6–5.68) | |
| Admission during night | 0.90 | |||
| No | 39 (10.6) | 328 (89.4) | Reference | |
| Yes | 16 (10.3) | 140 (89.7) | 0.96 (0.51–1.75) | |
| Weekend admission | 0.64 | |||
| No | 40 (10.2) | 345 (89.8) | Reference | |
| Yes | 15 (11.6) | 114 (88.4) | 1.16 (0.60–2.14) | |
| Obstetric early warning score‡ | 0.0008 | |||
| Green | 3 (2.7) | 107 (97.3) | Reference | |
| Yellow | 5 (7.5) | 62 (92.5) | 2.88 (0.68–14.41) | |
| Red | 46 (13.9) | 284 (86.1) | 5.78 (2.06–24.14) | |
| SpO2 (%)*§ | 96 (90–98) | 98 (97–99) | 0.91 (0.88–0.94) | < 0.0001 |
| Temperature (°C)*‖ | 36.4 (35.7–37.1) | 36.5 (36.1–36.8) | 1.24 (0.88–1.76) | 0.23 |
| Heart rate (beats/minute)*‖ | 120 (98–1,409) | 112 (99–128) | 1.01 (0.99–1.02) | 0.38 |
| Respiratory rate (movements/minute)*¶ | 32 (27–45) | 28 (24–34) | 1.02 (1.00–1.04) | 0.03 |
| SpO2/fraction of inspired oxygen ratio*¶ | 438 (237–462) | 467 (462–471) | 0.99 (0.99–0.99) | < 0.0001 |
| Alert, voice, pain unresponsive# | < 0.0001 | |||
| Alert/vocal | 17 (5.1) | 315 (94.9) | Reference | |
| Pain/unresponsive | 35 (20.2) | 138 (79.8) | 4.70 (2.58–8.86) | |
| Systolic blood pressure (mmHg)*# | 113 (92–139) | 125 (112–143) | 0.98 (0.97–0.99) | 0.0001 |
| Diastolic blood pressure (mmHg)*# | 65 (40–80) | 79 (60–91) | 0.97 (0.96–0.98) | 0.0001 |
| Hemoglobin (g/dL)*** | 8.0 (6.0–10.4) | 8.3 (6.5–10.5) | 0.95 (0.85–1.06) | 0.36 |
| Oxygen at admission | < 0.0001 | |||
| No | 36 (8.0) | 416 (92.0) | Reference | |
| Yes | 19 (26.8) | 52 (73.2) | 4.22 (2.23–7.84) | |
| Vasopressors at admission | < 0.0001 | |||
| No | 42 (8.6) | 446 (91.4) | Reference | |
| Yes | 13 (37.1) | 22 (62.9) | 6.27 (2.89–13.23) |
SpO2 = transcutaneous saturation of hemoglobin. Bold values indicate statistically significant results.
*
Data expressed as n (%) or median (interquartile range).
†
Data not available in 11 patients.
‡
Data not available in 16 patients.
§
Data not available in 15 patients.
‖
Data not available in 17 patients.
¶
Data not available in 19 patients.
#
Data not available in 18 patients.
**
Data not available in 70 patients.