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Table 2 Comparison of comprehensive and delivery-only indices using Tanzania (including Zanzibar) Round 1 dataa

From: Measuring the quality of maternal and care processes at the time of delivery in sub-Saharan Africa: development and validation of a short index

  Comprehensive index Delivery-only index
Score distribution
 Mean (% of maximum achievable) 12.12 (57.71%) 7.48 (57.54%)
 Maximum (% of maximum achievable) 21 (100.00%) 13 (100.00%)
 Minimum (% of maximum achievable) 0 (0.00%) 0 (0.00%)
Validation domains and benchmarks
 1. Representation of QoPIIPC dimensions:
  - # of dimensions (out of 5) 4 3
 2. Association of index with overall QoC performance:
  - B coefficient from SLR of total QoC score (p-value) 8.91b (< 0.001) 8.20 (< 0.001)
 3. Association of individual items with overall QoC performance:
  - # items without significant relationship to total QoC score 1 0
  - # items without significant relationship to good QoC score (absolute) 4 3
  - # items without significant relationship to poor QoC score (relative) 3 1
 4. Ability to distinguish between good and poor performance:
  - AUROC good total QoC score - absolute 0.976c 0.924
  - AUROC good total QoC score – relative 0.935 0.918
  - AUROC poor total QoC score - relative 0.940c 0.900
  - OR good total QoC score – absolute (p-value) 51.33 (p < 0.001) 10.00 (p < 0.001)
  - OR good total QoC score – relative (p-value) 34.08d (p < 0.001) 16.43 (p < 0.001)
  - OR poor total QoC score – relative (p-value) 0.029d (p < 0.001) 0.072 (p < 0.001)
 5. Range of performance frequency:
  - # of items performed in < 30% of cases 3 2
  - # of items performed in < 40% of cases 5 3
  - # of items performed in > 90% of cases 3 2
 6. Distribution of index score:
  - Coefficient of variation 28.52 30.73
  - % of deliveries with minimum index score 0.35% 0.71%
  - % of deliveries with maximum index score 0.71% 1.77%
  1. aStandardized coefficients and ORs are presented to enable comparison across indices with different numbers of items
  2. bSignificant difference from coefficient for delivery-only index (likelihood ratio test)
  3. cSignificant difference from AUC for delivery-only index (χ2)
  4. dSignificant difference from OR for delivery-only index (likelihood ratio test)