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Table 3 The number of malaria cases investigated in different types of county in China, January 2013-June 2014

From: China’s 1-3-7 surveillance and response strategy for malaria elimination: Is case reporting, investigation and foci response happening according to plan?

Type of county Total cases Case investigation
≤3 days >3 days
No (%) No (%) Days of delay (Median)
Type 1 492 472 (96) 20 (4) 5
Type 2 2030 1999 (98) 31 (2) 6
Type 3 2939 2851 (97) 88 (3) 6
Type 4 227 222 (98) 5 (2) 6
Total 5688 5544 (97) 144 (3) 5
  1. χ 2 (Type 1 vs Type 2) = 12.87, P = 0.0003*
  2. χ 2 (Type 1 vs Type 3) = 1.59, P = 0.208
  3. χ 2 (Type 1 vs Type 4) = 1.60, P = 0.205
  4. χ 2 (Type 2 vs Type 3) = 11.06, P = 0.0009*
  5. Fisher (Type 2 vs Type 4): P = 0.401
  6. Fisher (among groups): P = 0.0013
  7. *P<0.05