Table 1. Number of individuals in each class, and average number and duration of contacts during the study per individual in each class.
| Group* | Number of individuals | Average number of contacts perindividual (SD) | Average duration (seconds) of contacts per individual (SD) |
| NUR | 27 | 590 (470) | 27111 (24395) |
| PAT | 29 | 136 (112) | 6327 (5421) |
| MED | 11 | 558 (341) | 27307 (16275) |
| ADM | 8 | 258 (291) | 10135 (11439) |
| Overall | 75 | 374 (390) | 17293 (19265) |
Numbers in parenthesis give the standard deviation.
*
Abbreviations: NUR, paramedical staff (nurses and nurses’ aides); PAT, Patient; MED, Medical doctor; ADM, administrative staff.