tailieunhanh - How to Display Data- P7

How to Display Data- P7:The best method to convey a message from a piece of research in health is via a fi gure. The best advice that a statistician can give a researcher is to fi rst plot the data. Despite this, conventional statistics textbooks give only brief details on how to draw fi gures and display data. | 22 How to Display Data b Type of delivery Figure Continued. individuals inthis category compared to 2221 in the normal delivery category and so vaginalbreech Wrtlrr comprise 1 of births. However this is not the impression given in Figure . Above all else a graph should be simple and accurately reflect tbe data so that thereader can easilyunderstand the information being rameye id. Neither Signse not b dothit andshould noi be used. A ftnal aoint ebo ut tbree-dsmeo tionul der diattsis chatrtusmbe hard to readbiescsbaiparticuloaSy tor dCocegarsfststheataway frem shateele markers as iita ecS gieíd wUatger thoocale shodlULit ieaderomthstsaCbe from the baeh. While Fituees end tstr loss vioually ts eiii ey thenFsgurw a .4e and b they eremunh cleorsrand ttciambsdoousandmoteeceueoaaiceafltcS the data. ClustdOed bar charts The data in Table can be further classified into whether or not the baby the first printiparous or subsequent eh Id ult parous Table 3 3 . It now becomes impossible to present the data as a single pie chart or bar Displaying univariate categorical data 23 Table Self-reported type of delivery for new mothers n 3221 What kind of delivery Primiparous Multiparous Normal vaginaldel very 857 5 .1 2 n 6-4 Emergency caesarean section 302 132 once labour had started Planned caesarean section 72 179 Ventouse vacuum extractor 162 48 Forceps delivery 76 13 Vaginal breec hddmetv 7 9 Total 1476 1745 chart. These data are categorised in two ways by type of delivery and parity enabling the distribution of delivery type to be compared between those women who had no previous children and those who had at least one. Table is an example ofa 5X2conft ttgencytaMe with 6 rows representing type of delivery end2 coiumna rrpresetting get itai andat ta bait toliavt 02 cells 6 X 2 . More omtarally acontingenau CxbltwitXr rows andcgo2rnms is known asm 2ye condsngtnay table a ndf i s h .