Table 5.

Duration of moderately bad symptoms, according to duration of antibiotic prescribed and antibiotic class

Duration of moderately bad symptoms, median days (IQR)Univariate risk ratio, (95% CI, P-value)Hazard ratio controlling for clustering, antibiotic (immediate or type (delayed), and baseline severity score 95% (CI, P-value)Hazard ratio controlling for propensity score, (95% CI, P-value)Hazard ratio controlling for propensity score in imputed dataset, (95% CI, P-value)
Duration of antibiotic prescription
5 days (reference category)3 (2–5)1.001.001.001.00
7 days3 (2–5)1.06 (0.89 to 1.27)
P= 0.527
1.05 (0.91 to 1.23)
P= 0.488
1.05 (0.90 to 1.23)
P= 0·513
1.07 (0.91 to 1.25)
P= 0.418
10 days3 (2–5)0.99 (0.79 to 1.24)
P= 0.957
0.99 (0.83 to 1.20)
P= 0.963)
0.92 (0.74 to 1.14)
P= 0.432
0.92 (0.73 to 1.15)
P= 0.460
Antibiotic class
Phenoxymethylpenicillin (reference category)3 (2–5)1.001.001.001.00
Other antibiotics3 (2–5)0.94 (0.80 to 1.10)
P= 0.435
0.94 (0.82 to 1.07)
P= 0.350
1.03 (0.88 to 1.21)
P= 0.698
1.04 (0.89 to 1.21)
P= 0.631
  • IQR = interquartile range.