Comparison of sound quality between PSAPs and conventional hearing aids. (A) The pooled result showed nonsignificant difference (SMD, -0.37; 95% CI, -0.87 to 0.13; P = .15; I2=77%). (B) After excluding the patients with moderately severe hearing loss in Cho et al., the result remained nonsignificant (SMD, -0.42; 95% CI, -1.08 to 0.23; P = .21; I2=83%). IV indicates the inverse variance method; SW indicates that the analysis adopted Sound World Solutions CS50+ PSAP used in Brody et al.; MHL indicates mild hearing loss; MDHL indicates moderate hearing loss; MSHL indicates moderately severe hearing loss; PHA indicates premium hearing aid used in Cho et al.