Table 2 Study characteristics

Language, N (%)

English

3494

(79.7)

French

890

(20.3)

Study location

Adamawa

195

(4.4)

Centre

1972

(45.0)

East

211

(4.8)

Far North

226

(5.2)

Littoral

747

(17.0)

North

216

(4.9)

North West

480

(10.9)

South

239

(5.5)

South West

561

(12.8)

West

331

(7.5)

Nationwide

90

(2.1)

Not reported

812

(18.6)

Study designs

Experimental

250

(5.7)

Observational

3144

(71.7)

Secondary analysis

283

(6.5)

Qualitative

181

(4.1)

Mixed methods studies

88

(2.0)

Other

437

(10.0)