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Table 4 The distribution of early and late instars of Anopheline mosquitoes in man-made habitats (A = ponds, B = water canals) provided with different treatments

From: Development of environmental tools for anopheline larval control

Early instars

Late instars

Variable

Parameter

EMM

95% CI for EMM

Odds Ratio

95% CI for Exp (B)

P

EMM

95% CI for EMM

Odds Ratio

95% CI for Exp (B)

P

A) Ponds

Bti only

2.376

1.926-2.826

0.891

0.679 - 1.169

0.404

0.570

0.364-0.776

0.752

0.475-1.192

0.225

 

Fish only

3.067

2.604 - 3.505

1.145

0.899 - 1.460

0.272

0.903

0.697-1.109

1.192

0.793-1.791

0.398

 

Bti -Fish (half)

1.733

1.283-2.183

0.650

0.486 - 0.869

0.004*

0.485

0.279-0.691

0.640

0.405-1.012

0.056*

 

Fish Once

2.667

2.217-3.117

1.000

0.786 - 1.272

1.000

0.964

0.757-1.170

1.272

0.844 - 1.916

0.250

 

Bti -Fish (full)

0.867

0.417-1.317

0.325

0.211 - 0.499

0.000*

0.261

0.054-0.467

0.344

0.190 - 0.623

0.000*

 

Control

2.667

2.217-3.117

1

  

0.758

0.551-0.964

1

  

B) Water canals

Bti only

0.635

0.115-1.156

0.186

0.120-0.289

0.000*

0.161

0.042-0.365

0.137

0.068-0.278

0.000*

 

Fish only

1.906

1.386-2.427

0.558

0.374-0.832

0.004*

0.547

0.344-0.750

0.465

0.288-0.750

0.002*

 

Bti-Fish

0.740

0.219-1.260

0.216

0.143-0.327

0.000*

0.125

0.078-0.328

0.106

0.056-0.200

0.000*

 

Control

3.417

2.896-3.937

1

  

1.177

0.974-1.380

1

  
  1. * shows habitats that are significantly different from the control. EMM = estimated marginal mean; CI = confidence interval; N = number of times sampled; P = significance level at 95%