Table 4

The factors contributing to the success of the implantation

FactorsN/per cent success in 1 yearOR95% CIP value
Age
Infants and toddlers (<4 years) (n=9)8 (88.89)1
Pre-school children (4–7 years) (n=28)25 (89.29)1.040.09 to 11.470.973
Early school children (8–12 years) (n=27)23 (85.19)0.720.07 to 7.420.782
Adolescents (13–18 years) (n=23)22 (95.65)2.750.15 to 49.360.492
Adults (>18 years) (n=138)114 (82.61)0.590.07 to 4.970.631
Sex
Male (n=119)103 (86.55)1
Female (n=107)89 (83.18)0.770.37 to 1.590.479
Onset of hearing loss
Prelingual hearing loss (n=112)98 (87.50)1
Postlingual hearing loss (n=118)97 (82.20)0.660.32 to 1.370.266
Type of communication
Oral (n=122)108 (88.52)1
Sign language (n=21)18 (85.71)0.780.20 to 2.980.714
Combined (n=77)61 (79.22)0.490.23 to 1.080.078
Aetiology
Congenital (n=112)98 (87.50)1
Acquired (n=115)95 (82.61)0.680.32 to 1.420.304
IQ
Above low Average (n=62)51 (82.26)1
Borderline or extremely low (n=36)33 (91.67)2.370.62 to 9.150.210
Mental health
Normal (n=81)66 (81.49)1
Abnormal (n=6)3 (50.00)0.230.04 to 1.240.087
Type of hospital
Tertiary hospital (n=18)17 (94.44)1
University hospital (n=212)178 (83.96)0.310.04 to 2.390.260
Electrode insertion
Full (n=214)183 (85.51)1
Partial (n=15)11 (73.33)0.470.14 to 1.560.214
Insertion technique
Cochleostomy (n=158)130 (82.28)1
Round window (n=69)62 (89.86)1.910.79 to 4.610.151