Table 4 Patients to answered to the PREMs questionnaire over time: absolute numbers of respondents and response rate, as ratio between patients who responded and patients who accepted to take part to PREMs, and relative mean, minimum, maximum and standard deviation)

From: Using patient-reported measures to drive change in healthcare: the experience of the digital, continuous and systematic PREMs observatory in Italy

			Respondents by month				Response rate by month
Total by month	Total Respondents	Mean Response Rate	Mean	Min	Max	SD	Mean	Min	Max	SD
mar-18	1	33%	1	1	1	–	33%	33%	33%	–
apr-18	31	35%	31	31	31	–	35%	35%	35%	–
may-18	58	40%	58	58	58	–	40%	40%	40%	–
jun-18	59	40%	59	59	59	–	40%	40%	40%	–
jul-18	63	36%	31,5	11	52	28,99	36%	35%	37%	1%
aug-18	92	34%	46	40	52	8,49	34%	26%	42%	12%
sep-18	119	35%	59,5	49	70	14,85	35%	29%	42%	9%
oct-18	237	35%	47,4	30	83	20,55	35%	17%	45%	11%
nov-18	797	44%	88,56	28	243	73,87	42%	21%	89%	23%
dec-18	779	29%	43,28	1	120	38,76	28%	9%	47%	11%
jan-19	1093	28%	13	9	156	42,50	27%	12%	39%	8%
feb-19	1287	30%	61,29	2	197	50,08	29%	12%	37%	12%
Total	4616	–
Mean	384,67	35%
Min	1	28%
Max	1287	44%
SD	467,88	5%

Note. Time-period: March 2018–February 2019

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