Table 2. Correlations among PTSD, somatization, age, and FSIQ.

		PTSD symptom	Somatization score	Age	FSIQ
	PTSD symptom	―	rho = 0.372 a p = 0.003	rho = 0.164 p = 0.211	r = -0.081 p = 0.540
	Somatization score		―	rho = 0.025 p = 0.844	rho = 0.121 p = 0.344
	Age			―	rho = -0.397 a p = 0.001
	FSIQ				―
Mean ± SD or Median [IQR]		47.80 ±12.80	58.00 [50.00–64.00]	11.00 [9.00–13.00]	90.63 ± 16.97

^a p < 0.05

Pearson’s correlation coefficient for normally distributed data and Spearman’s correlation coefficient for data which are not normally distributed.

PTSD symptoms: Post-traumatic Stress Disorder symptoms scores on the Trauma Symptom Checklist for Children (presented as T-score), Somatization score: somatic problem score on the Child Behavior Checklist (presented as T-score)

FSIQ: full scale intelligence quotient, SD: standard deviation, IQR: interquartile range