Table 3.

Effect of several traumatic memories on post-traumatic stress disorder

Group	Traumatic memories (percentage)
	Pain	Difficulties in breathing	Nightmares	Anxiety
All patients	61	68	79	63
'High-scoring patients'	78	78	89	89
'Low-scoring patients'	53	63	74	51
Difference	χ2 = 3.3; p = 0.087b	n.s.	n.s.	χ2 = 7.6; p ≤ 0.008a

The proportion of patients recalling traumatic memories in different groups (all patients, 'high-scoring patients' with a Post-Traumatic Stress Syndrome 10-Questions Inventory (PTSS-10) score greater than or equal to the cutoff score of 35, indicating an increased risk for development of post-traumatic stress disorder, and 'low-scoring patients' with PTSS-10 score below the cutoff score). The χ² test revealed a significant difference of frequency in anxiety memories between groups. n.s., non-significant difference. ^aSignificant difference; ^btrend.