Influence of the frequency at which the doctors accepted gifts on the number of prescriptions, the daily doses (defined daily dose, DDD) and expenditure per patient (means +/− SD).

The p-values result from two-sided tests comparing the means reported above and below. Differences nominally significant at a level of p≤0.005 (see methods) are reported with a bold font p-value.
Influence of the frequency at which the doctors accepted gifts on the number of prescriptions, the daily doses (defined daily dose, DDD) and expenditure per patient (means +/− SD).