Role of topical antibiotic ointment in the lateral graft following underlay myringoplasty: a prospective randomised study

Table 2 Comparison of hearing gains, the air–bone gap, and bone conduction

	Pre-operative (dB ± S.D.)	Post-operative (dB ± S.D.)	P^a	Gain (mean)	P^b
UAO group (n = 68)
Average ABG, dB	23.8 ± 2.6	10.4 ± 3.2	0.001*	13.5 ± 2.6
Average BC PTA, dB	14.1 ± 2.8	13.9 ± 5.1	0.794
NAO group (n = 67)
Average ABG, dB	24.1 ± 1.7	11.2 ± 4.4	0.001*	13.1 ± 4.9	0.745
Average BC PTA, dB	14.5 ± 1.9	14.0 ± 2.8	0.681

dB decibel, S.D. Standard deviation, ^aPaired Samples test ^bMann Whitney U test
^*P < 0.01
^aComparison between the same groups in regard to ABG or bone conduction, pre- and postoperatively
^bComparison between two groups in terms of gain, pre- or postoperatively
BC: bone conduction; PTA:pure-tone average;

ISSN: 1916-0216