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Effect sizes (r) of group differences in NSSs in terms of nonhealthy vs healthy group comparisons before (a) and after exact matching (b) and propensity score matching (c). Greater value of r means that the nonhealthy comparison group shows more NSSs compared to the healthy group. Error bars denote 95% confidence intervals (CIs). NSS, neurological soft sign; OP, other psychiatric; Schi., schizophrenia; SPD, schizotypal personality disorders.
