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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.