TABLE 4.

Use of Medication 12 to 14 Years After Whiplash Injury in Risk Strata

	Weak Analgesics			Opioids			Prophylactic Medications
Risk Strata	Acetylsalicylic Acid	Acetaminophen	NSAIDs	Weak Opioid	Strong Opioid	Triptans/Migraine	Anticonvulsants	Antidepressants	Other Medication
1	0.07 (0.01, 0.31)	0.07 (0.01, 0.31)	0.04 (0.01, 0.36)	0.00 (0.00, 0.08)	0.00 (0.00, 0.08)	0.00 (0.00, 0.08)	0.00 (0.00, 0.08)	0.00 (0.00, 0.08)	0.02 (0.00, 0.64)
2	0.03 (0.01, 0.16)	0.15 (0.09, 0.26)	0.08 (0.04, 0.19)	0.01 (0.00, 0.43)	0.01 (0.00, 0.43)	0.04 (0.01, 0.16)	0.01 (0.00, 0.43)	0.02 (0.00, 0.20)	0.02 (0.00, 0.20)
3	0.00 (0.00, 0.06)	0.24 (0.14, 0.39)	0.1 (0.04, 0.27)	0.05 (0.01, 0.26)	0.00 (0.00, 0.06)	0.02 (0.00, 0.58)	0.00 (0.00, 0.06)	0.05 (0.01, 0.26)	0.00 (0.00, 0.06)
4	0.00 (0.00, 0.09)	0.39 (0.24, 0.58)	0.26 (0.13, 0.47)	0.05 (0.01, 0.41)	0.08 (0.02, 0.36)	0.08 (0.02, 0.36)	0.00 (0.00, 0.09)	0.00 (0.00, 0.09)	0.05 (0.01, 0.41)
5	0.00 (0.00, 0.15)	0.43 (0.23, 0.67)	0.35 (0.16, 0.61)	0.13 (0.03, 0.50)	0.13 (0.03, 0.50)	0.00 (0.00, 0.15)	0.04 (0.00, 0.78)	0.00 (0.00, 0.15)	0.04 (0.00, 0.78)
6	0.00 (0.00, 0.10)	0.44 (0.28, 0.63)	0.25 (0.12, 0.46)	0.06 (0.01, 0.42)	0.08 (0.02, 0.37)	0.11 (0.03, 0.37)	0.00 (0.00, 0.10)	0.06 (0.01, 0.42)	0.03 (0.00, 0.69)
7	0.07 (0.00, 0.85)	0.33 (0.12, 0.67)	0.47 (0.21, 0.74)	0.13 (0.02, 0.66)	0.13 (0.02, 0.66)	0.07 (0.00, 0.85)	0.07 (0.00, 0.85)	0.00 (0.00, 0.22)	0.07 (0.00, 0.85)
Total	0.02 (0.009, 0.04)	0.25 (0.20, 0.30)	0.15 (0.12, 0.20)	0.04 (0.02, 0.07)	0.04 (0.02, 0.06)	0.04 (0.02, 0.06)	0.009 (0.002, 0.03)	0.02 (0.009, 0.04)	0.03 (0.01, 0.05)
	NS	***	***	*	**	NS	NS	NS	NS

Data presented as frequencies with 95% confidence intervals (binomial exact) in brackets.

NS indicates not statistically significant difference between strata; NSAID, non-steroidal anti-inflammatory drugs.

K-W: *P<0.05.

**P<0.01.

***P<0.001.