WIP: Display asterisk next to P-Value when it is below a defined threshold

[tompollard]

In #138, @davidkurland asks whether we could highlight P-Values that fall below a threshold.

This pull request adds a pval_threshold argument. When set (e.g. pval_threshold = 0.01), we display an asterisk (*) after all p-values that fall below this threshold.

e.g.

from tableone import TableOne, load_dataset

data = load_dataset('pn2012')

table1 = TableOne(data, groupby="death", pval=True, pval_threshold=0.2)
print(table1.tabulate(tablefmt = "github"))

Displays:

		Missing	Overall	0	1	P-Value
n			1000	864	136
Age, mean (SD)		0	65.0 (17.2)	64.0 (17.4)	71.7 (14.0)	<0.001*
SysABP, mean (SD)		291	114.3 (40.2)	115.4 (38.3)	107.6 (49.4)	0.134*
Height, mean (SD)		475	170.1 (22.1)	170.3 (23.2)	168.5 (11.3)	0.304
Weight, mean (SD)		302	82.9 (23.8)	83.0 (23.6)	82.3 (25.4)	0.782
ICU, n (%)	CCU	0	162 (16.2)	137 (15.9)	25 (18.4)	<0.001*
	CSRU		202 (20.2)	194 (22.5)	8 (5.9)
	MICU		380 (38.0)	318 (36.8)	62 (45.6)
	SICU		256 (25.6)	215 (24.9)	41 (30.1)
MechVent, n (%)	0	0	540 (54.0)	468 (54.2)	72 (52.9)	0.862
	1		460 (46.0)	396 (45.8)	64 (47.1)
LOS, mean (SD)		0	14.2 (14.2)	14.0 (13.5)	15.4 (17.7)	0.386

[tompollard]

@davidkurland @jraffa please could you take a look at this and let me know if any changes are needed?

[tompollard]

@jraffa is happy with the approach, but reminded me to double check that this works for adjusted values too.

[tompollard]

Looks okay to me:

from tableone import TableOne, load_dataset

data = load_dataset('pn2012')
table1 = TableOne(data, groupby="death", pval=True, pval_adjust="bonferroni",
                  pval_threshold=0.99)
print(table1.tabulate(tablefmt = "github"))

		Missing	Overall	0	1	P-Value (adjusted)
n			1000	864	136
Age, mean (SD)		0	65.0 (17.2)	64.0 (17.4)	71.7 (14.0)	<0.001*
SysABP, mean (SD)		291	114.3 (40.2)	115.4 (38.3)	107.6 (49.4)	0.936*
Height, mean (SD)		475	170.1 (22.1)	170.3 (23.2)	168.5 (11.3)	1.000
Weight, mean (SD)		302	82.9 (23.8)	83.0 (23.6)	82.3 (25.4)	1.000
ICU, n (%)	CCU	0	162 (16.2)	137 (15.9)	25 (18.4)	0.001*
	CSRU		202 (20.2)	194 (22.5)	8 (5.9)
	MICU		380 (38.0)	318 (36.8)	62 (45.6)
	SICU		256 (25.6)	215 (24.9)	41 (30.1)
MechVent, n (%)	0	0	540 (54.0)	468 (54.2)	72 (52.9)	1.000
	1		460 (46.0)	396 (45.8)	64 (47.1)
LOS, mean (SD)		0	14.2 (14.2)	14.0 (13.5)	15.4 (17.7)	1.000