Table 3.

Incidence of DRPs in the polypharmacy groups

	SCI		Control
High-risk drug class	Number of subjects on class at time of DRP	% of subjects with a DRP	Number of subjects on class at time of DRP	% of subjects with a DRP
Narcotics	273	43%	30	14%
Anticonvulsants	191	30%	25	11%
Serotoninergics	187	29%	40	18%
Antianxiety	147	23%	19	9%
Skeletal muscle relaxants	105	16%	8	4%
Sedatives	87	14%	14	6%
Tricyclic antidepressants	31	5%	8	4%
Total	637		217

Table 3 demonstrated the percentage of individuals who had a reported DRP and were taking a medication within one of the high-risk classes of drugs (8.6 vs. 2.13; P < 0.05). For example, 43% of individuals with SCI who were on a narcotic also reported a DRP compared to 14% of controls.