Table 2. Comparison between groups with high and medium/low nursing workload in relation to the numeric variables.

Variables	NAS		p*
	High	Medium/Low
	(Mean ± SD)	(Mean ± SD)
Age	40.4±16.1	40.9±19.9	0.567
Time interval between admission tothe ER and ICU (hours)	21.0±33.2	33.8±67.3	0.235
Charlson comorbidity index	0.6±1.7	0.6±1.3	0.176
ISS	21.5±10.0	18.1±8.4	0.012
NISS	29.9±9.5	25.6±9.7	0.003
Number of affected body regions	3.1±1.3	2.5±1.3	0.009
Number of AIS injuries ≥3	3.6±1.8	2.8±1.8	0.001
APACHE II risk of death	32.8±21.4	21.7±16.6	<0.001
SAPS II risk of death	32.7±25.7	17.7±19.0	<0.001
LODS risk of death	30.0±23.4	16.4±16.4	<0.001
Number of compromised systems	3.0±1.0	2.0±1.2	<0.001

São Paulo, Brazil (2010–2011).

*Mann-Whitney Test.