Table 3.

Symptoms experienced during the most serious overdose (OD) experience.

	History of any OD (n=553)	OD involved Alcohol only (n=251)	OD involved Opiates or Sedatives (n=175)	OD involved Stimulants (n=121)	Severe OD ^b (n=287)

	N (%)	N (%)	N (%)	N (%)	N (%)
Symptoms Experienced
Nausea/vomiting	416 (75%)	225 (89%)^*	119 (68%)^*^{^}	91 (75%)^{^}	223 (78%)
Loss of consciousness	194 (35%)	66 (26%)^*	88 (50%)^*^{^}	61 (50%)^*^{^}	194 (68%)
Blacked out	285 (52%)	127 (51%)	107 (61%)^*^{^}	80 (66%)^*^{^}	197 (69%)
Awake, but no memory of what happened	235 (43%)	112 (45%)	80 (46%)	62 (51%)^*	159 (55%)
Difficulty breathing/stopped breathing	110 (20%)	28 (11%)^*	50 (29%)^*^{^}	48 (40%)^*^{^}	110 (38%)
Skin turned blue or pale	44 (8%)	12 (5%)^*	24 (14%)^*^{^}	20 (16%)^*^{^}	44 (15%)
Collapsed	120 (22%)	39 (15%)^*	56 (32%)^*^{^}	44 (36%)^*^{^}	120 (42%)
Could not be awakened	127 (23%)	46 (18%)^*	62 (35%)^*^{^}	38 (31%)^*^{^}	127 (44%)
Heartbeat was too fast or too slow	164 (30%)	56 (22%)^*	63 (36%)^*^{^}	64 (53%)^*^{^}	126 (44%)
Had a heart attack	13 (2%)	3 (1%)	6 (3%)	8 (7%)^*	13 (4%)
Had convulsions	34 (6%)	8 (3%)^*	20 (11%)^*	18 (15%)^*	34 (12%)
Had fever or felt too cold	97 (18%)	32 (13%)^*	43 (25%)^*^{^}	38 (31%)^*^{^}	81 (28%)
Had hallucinations	73 (13%)	21 (8%)^*	28 (16%)^{^}	36 (30%)^*^{^}	58 (20%)
Was shaking	153 (28%)	57 (23%)^*	65 (37%)^*^{^}	49 (40%)^*^{^}	114 (40%)
None of these	36 (6%)	5 (2%)^*	7 (4%)	4 (3%)	1 (0.3%)

p < 0.05 for comparison between those in each group and all others with a history of OD

^{^}

p < 0.05 for comparison between OD involved alcohol only and OD involved opiates/sedatives or OD involved stimulants, not tested if any cell n < 10. OD involved Opiates or Sedatives and OD involved Stimulants not compared because they were not mutually exclusive.

No tests conducted in this category because the category was defined by the symptoms measure.