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Table 4 Coefficient estimates of population average negative binomial models predicting monthly cases

From: Mass drug administration for the control and elimination of Plasmodium vivax malaria: an ecological study from Jiangsu province, China

Parameter Incidence rate ratio (IRR) and 95% CI (n = 11 prefectures)
(1977-1983) vs (1973-1976)a 0.19b (0.11 to 0.33)
Annual MDA: (1973-1976)a 0.98c (0.97 to 1.00)
Annual MDA: (1977-1983)a 1.05b (1.03 to 1.06)
Annual chemoprophylaxis 0.98 (0.96 to 1.00)
Bed nets per person 1.03 (0.94 to 1.13)
Rainfall (lagged 1 month) 1.02 (0.98 to 1.06)
GDP 0.95 (0.87 to 1.04)
n (prefecture-months) 1452  
  1. Models include month dummies to control for seasonality and prefecture dummies to control for unobserved fixed effects (coefficient estimates not shown).
  2. aadjusted analyses.
  3. bp < 0.001.
  4. cp < 0.05.