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Table 1 Data collected on wholesale and retail sales volumes using recall and retail audit methods

From: Comparative analysis of two methods for measuring sales volumes during malaria medicine outlet surveys

  Number of products surveyed (%)1
  Wholesale SLS Retail SLS
  Anti-malarials RDT Anti-malarials RDT
Total products surveyed 104 (100%) 34 (100%) 143 (100%) 42 (100%)
Recall method (RC)   
Sales volume data collected 76 (73.1%) 26 (76.5%) 130 (91.0%) 41 (97.6%)
- Not remembered 17 (16.3%) 7 (21.6%) 3 (2.8%) 1 (2.4%)
- Refused 11 (10.6%) 1 (2.9%) - -
- Missing2 - - 10 (7.0%) -
Retail Audit method (RA)   
Sales volumes data calculated (excluding negatives) 82 (78.8%) 29 (85.3%) 115 (80.4%) 35 (83.3%)
Sales volumes data calculated (including negatives)3 94 (90.4%) 31 (91.2%) 121 (84.6%) 39 (92.9%)
Stock data collected 96 (92.3%) 31 (91.2%) 121 (84.6%) 39 (92.9%)
- Refused 8 (7.7%) 3 (8.8%) 12 (8.4%) 3 (7.1%)
- Missing2 - - 10 (7.0%) -
Received quantities collected 103 (99.0%) 33 (97.1%) 133 (93.0%) 42 (100.0%)
- Refused 1 (1.0%) 1 (2.9%) - -
- Missing2 - - 10 (7.0%)  
Disposed quantities collected 101 (97.1%) 33 (97.1%) 133 (93.0%) 42 (100.0%)
- Refused 3 (2.9%) 1 (2.9%) - -
- Missing2 - - 10 (7.0%)  
  1. 1At the second visit of RA during which RC was implemented. 2missing strength data impeded calculation of data in terms of adult equivalent treatment doses. 3negative sales volume estimates were obtained when calculating (quantities in stock at 1st visit + quantities received in-between the 2 visits – quantities at 2nd visit – quantities disposed in-between the 2 visits), e.g. quantities stocked at second visit were higher than quantities stocked at first visit although shopkeepers did not report any quantities received. These negative estimates were excluded from the analysis.