Table 3.

Logistic regression model of the measure ‘tube obstruction’

Measures	Gross RC (95% CI)	P value	Adjusted RC (95% CI)	P Wald’s test	P LR test
No of medications prescribed via tube in 24 hours	1.27 (1.1 to 1.47)	0.0010	1.34 (1.1 to 1.63)	0.0030	0.0020
Time elapsed between preparation and administration of the drug	1.03 (1.01 to 1.05)	0.0150	1.06 (1.02 to 1.1)	0.0040	0.0010
Reference no versus yes
Washed the tube after finishing the medication	0.44 (0.15 to 1.36)	0.0530	0.02 (0 to 0.19)	0.0010	1.0000
Reference year 2014
Year 2015–2017	1.97 (1.01 to 3.84)	0.0450	1.06 (0.44 to 2.51)	0.9020	1.0000
Year 2018–2019	0.15 (0.07 to 0.33)	0.0010	0.05 (0.02 to 0.17)	0.0010	1.0000
Reference ‘washed the tube after finishing the medication’ in the year 2014
Year 2015–2017	1.13 (0.49 to 2.63)	7.9920	0 (0)	0.9910	1.0000
Year 2018–2019	2.42 (1.1 to 5.34)	0.0549	1055.45 (44.89 to 24814.45)	0.0010	1.0000

The statistically significant results are in bold.

Odds ratio

LR, likelihood ratio test.