Entomological impact of mass administration of ivermectin and dihydroartemisinin-piperaquine in The Gambia: a cluster-randomized controlled trial

Table 3 Vector parity and density by year and study group

Parameter	Methods	2018				2019
Parameter	Methods	Control, % (n/N)	Intervention, % (n/N)	Adj. RR (95% CI)	P-value	Control, % (n/N)	Intervention, % (n/N)	Adj. RR (95% CI)	P-value
Parity	CDC-LT	53.2 (91/171)	54.9 (50/91)	1.17 (0.93, 1.47)	0.181	81.7 (441/540)	84.2 (309/367)	1.01 (0.95, 1.52)	0.708
Parity	HLC	68.4 (807/1180)	61.5 (475/772)	0.87 (0.75, 1.01)	0.055	89.5 (111/124)	76.3 (132/173)	0.93 (0.65, 1.34)	0.649
Density^a	CDC-LT	282.2 (1571/1002)	118.3 (564/858)	0.47 (0.14, 1.57)	0.213	609.5 (3088/912)	256.3 (1914/1344)	0.39 (0.20, 0.74)	0.005
Density^a	HLC	2291.5 (4583/360)	1310.0 (2358/324)	0.45 (0.15, 1.35)	0.125	472.5 (315/120)	856.5 (571/120)	1.94 (0.88, 4.28)	0.088

Adj. IRR adjusted incidence rate ratio, CI confidence interval, n number of parous mosquitoes, N number of dissected mosquitoes, OR odds ratio, RR relative risk
^aNumber of mosquitoes per trapping nights multiplied by 180 days (30 days per month multiplied by 6 months per season per year)

ISSN: 1756-3305