Table 1

Comparison of background variables in the two randomised groups and the two different clinical settings

Intervention groupClinical setting
VariablesPretested CRP n=138CRP not pretested n=259p Value*OOH service n=230Paediatric emergency clinic n=167p Value†
Age (year)
 Mean (SD)2.13 (1.7)2.44 (1.9)0.1042.38 (1.7)2.29 (1.9)0.638
 Median (IQR)1.5 (0.9–2.9)1.9 (1.0–3.5)1.9 (1.0–3.5)1.5 (0.9–3.0)
Duration illness (day)
 Mean (SD)7.0 (11.0)6.4 (7.7)0.4346.0 (7.7)7.2 (9.9)0.175
 Median (IQR)4 (3–7)4 (2–7)4 (2–7)4 (2–7)
Temperature (°C)
 Mean (SD)38.0 (0.9)37.9 (1.0)0.89338.2 (0.9)37.7 (1.0)<0.001
 Median (IQR)38.0 (37.3–38.7)37.9 (37.2–38.8)38.1 (37.5–39.0)37.4 (36.9–38.4)
Respiratory rate (breath/min)
 Mean (SD)34.2 (15.0)31.8 (12.7)0.11834.0 (13.4)30.9 (13.6)0.028
 Median (IQR)30 (20–42)28 (20–40)31 (22–44)25 (20–38)
Earache24.427.40.56626.326.30.955
Cough86.184.00.66585.184.80.987
Dyspnoea61.654.40.09860.052.60.090
Diarrhoea19.118.60.65718.918.70.963
Taken paracetamol during the past 24 h65.966.50.78373.457.30.001
Gender (male)53.656.70.50257.852.60.370
General condition
 Normal29.020.10.05218.329.20.003
 Ill68.876.877.869.6
 Severely ill2.22.73.51.2
Pulse oximetry
 >95%53.658.70.18151.763.20.002
 90–95%29.024.330.020.5
 <90%2.91.93.50.6
Earlier experienced CRP
 Yes69.671.50.80076.963.20.109
 No2.21.50.92.9
 Do not know18.820.222.322.2
Chronic disease
 No disease75.474.10.85174.374.30.948
 Asthma18.120.821.318.1
 Allergy/other6.55.04.47.6
Consultation with paediatrician42.842.60.8400.0100.0
  • Numbers are proportions (%) otherwise stated.

  • *p Values from comparison of means and proportions in the intervention groups, using Student's t tests and non-parametric tests.

  • †p Values from comparison of means and proportions in the different clinical settings, using Student's t tests and non-parametric tests.

  • CRP, C reactive protein; OOH, out-of-hours.