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Table 4 Indicators of severe maternal morbidity according to WHO definition

From: Pre-validation of the WHO organ dysfunction based criteria for identification of maternal near miss

PLTC MNM MD Total LB
461 194 18 673 14.418
68.5% 28.8% 2.7%   
MNM incidence ratio: MNM/LB × 1000 = 13.46/1000 LB
Severe Maternal Outcome Ratio (SMOR) = (MNM+MD)/LB × 1000
SMOR = 14.7/1000 LB
Maternal near miss: mortality ratio: MNM: 1 MD = 10.7: 1
Mortality index: MI = MD/(MNM+MD) = 0.085 = 8.5%
Maternal mortality ratio: MMR = MD/LB × 100.000 = 124.84/100000 LB
  1. LB: live births; MD: maternal death; MI: mortality index; MMR: maternal mortality ratio; MNM: maternal near miss; PLTC: potentially life threatening condition; SMOR: severe maternal outcome ratio.