Skip to main content

Table 3 Odds ratios for SMO of the significant predictor variables

From: Development and validation of an obstetric early warning system model for use in low resource settings

Parameters Odds ratio* S. E Significance
(p)
95% CI
Lower Upper
Developmental model (n= 600; 200 cases versus 400 controls)
 sBP > 140 mmHg 5·26 0·49 0·001 2·03 13·63
 sBP < 90 mmHg 3·73 0·42 0·002 1·65 8·41
 dBP > 90 mmHg 2·78 0·48 0·035 1·08 7·16
 RR > 40 cycles/min. 25·20 0·92 < 0·001 4·19 51·60
 Temp> 38 °C 116·51 1·12 < 0·001 12·96 147·42
 PR > 120/min 4·62 0·43 < 0·001 2·00 10·66
 CS (Yes vs No) 5·91 0·38 < 0·001 2·79 12·53
 Number of CS 0·96 0·01 < 0·001 0·95 0·97
Validation model (n= 900); 300 cases versus 600 controls)
 sBP > 140 mmHg 8.61 0·56 < 0·001 4·32 32·82
 sBP < 90 mmHg 5.·42 0·33 0·002 2·66 7·35
 dBP > 90 mmHg 2·80 0·45 0·119 0·65 8·70
 Temp> 38 °C 123·21 2·95 0·002 62·83 136·95
 RR > 40 cycles/min 18·21 2·40 < 0·001 3·43 24·31
 CS (yes vs. no) 5·85 1·42 < 0·001 3·59 11·19
 Number of CS 0·97 0·06 < 0·001 0·95 0·99
 PR > 120/min 4·84 0·40 < 0·001 1·69 9·08
Performance checking model with total data set (n= 5243)
 sBP > 140 mmHg 15·50 0·31 < 0·001 8·38 28·69
 sBP < 90 mmHg 2·09 0·20 < 0·001 1·42 3·08
 dBP > 90 mmHg 0·89 0·30 0·706 0·50 1·61
 RR > 40 cycles/min 23·19 0·47 < 0·001 9·18 58·57
 Temp > 38 °C 55·90 0·46 < 0·001 22·64 138·02
 CS (yes vs no) 6·38 0·16 < 0·001 4·71 8·65
 Number of CS 0·98 0·00 < 0·001 0·98 0·98
 PR > 120 6·27 0·21 < 0·001 4·14 9·50
  1. *Absolute risk estimated by rounding the odds ratios to one significant figure