Table 3.
Comparison of the descriptive values of cost and revenue in American dollars ($), for patients undergoing coronary artery bypass surgery from March to September 2012, according to the length of stay - São Paulo, Brazil, 2017.
| Variable | Stay | N | Mean $ | SD $ | Median $ | Minimum $ | Maximum $ | P |
|---|---|---|---|---|---|---|---|---|
| Cost | ≤7 days | 416 | 4,978.73 | 1,109.62 | 4,834.28 | 3,300.26 | 20,654.31 | <0.001 |
| >7 days | 946 | 9,317.87 | 8,923.55 | 7,319.40 | 3,750.24 | 152,132.10 | ||
| Revenue | ≤7 days | 416 | 2,835.27 | 317.05 | 2,795.56 | 2,523.79 | 6,036.61 | <0.001 |
| >7 days | 946 | 3,721.38 | 2,061.22 | 3,276.03 | 2,526.93 | 28,874.10 | ||
| Difference | ≤7 days | 416 | -2,143.46 | 954.94 | -2,031.52 | -15,728.35 | 453,78 | <0.001 |
| >7 days | 946 | -5,596.50 | 7,282.94 | -4,011.12 | -124,745.13 | 2,095.49 | ||
| Difference % | ≤7 days | 416 | -41.91 | 7.54 | -42.37 | -76.15 | 8.13 | <0.001 |
| >7 days | 946 | -55.48 | 9.32 | -54.67 | -89.00 | 19.36 |
Percentage individually calculated through statistical analysis and with the value rounded for each patient in the sample (descriptive level of probability of the non-parametric Mann Whitney test).
The quotation of the US dollar (purchase) on 09/28/2012 was 2.0265 reais (http://economia.uol.com.br/cotacoes/cambio/dolar-comercial-estados-unidos/?historico).