Table 4.
Standard | <2.5 CFU/cm2 [3,5,7,20,22] | p * | <5 RLU/cm2 [22] | p * | <10 RLU/cm2 [23] | p * | <250 RLU [1,3,5,19,20,21] | p * | <500 RLU [4,6,21] | p * |
---|---|---|---|---|---|---|---|---|---|---|
Before intervention | 55/121 (45) | 0.004 | 47/121 (39) | 0.052 | 63/121 (52) | 0.017 | 65/121 (54) | 0.003 | 86/121 (71) | 0.082 |
After intervention | 78/121 (64) | 63/121 (52) | 82/121 (68) | 88/121 (73) | 96/119 (81) |
* chi-squared test; The number in the brackets indicates the references in which this criterion is used. Data are the proportion (%) of the surface samples tested.