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Table 2 Significant spatial and spatiotemporal clusters of fetal loss and infant death in Matlab, Bangladesh, 1991-2000

From: Spatial patterns of fetal loss and infant death in an arsenic-affected area in Bangladesh

Analysis type Adjustment Cluster Time Observed cases Expected cases Relative Risk P value Arsenic concentration
         Mean Median IQR
Spatial Unadjusted High - 314 228.55 1.409 0.005 319 312 171-433
   Low - 429 545.33 0.758 0.004 174 74 1-302
  Adjusted* High - 303 218.98 1.418 0.005 322 312 181-436
   Low - 429 541.75 0.764 0.008 174 74 1-302
Spatiotemporal Unadjusted High 1992-1995 294 209.73 1.437 0.019 322 304 186-435
   Low - - - - - - - -
     - - - - - - -
  Adjusted* High - - - - - - - -
   Low - - - - - - - -
  1. IQR: Inter Quartile Range,
  2. * Analysis was adjusted for age, parity, education and socioeconomic status
  3. Note, Unadjusted analysis and adjustment for age, parity, education and socioeconomic status are presented separately. Arsenic concentration via tube-well water was compared between clusters by Analysis of variance (ANOVA). (See Figures 2 and 3 for cluster location).