Table 4a.

Factors associated with technically troubled dialysis

	TTD		Univariate analysis			Multivariate analysis
Predictor	No	Yes	OR (95% CI)	P	P (Overall)	OR (95% CI)	P	P (Overall)
Total Sessions	22 379	3451 (13.4%)
Emoticon
Very happy	7740	950 (10.9%)	1			1
Happy	12 161	1959 (13.9%)	1.31 (1.21–1.43)	<.001	<.001	1.14 (1.04–1.25)	<.001	<.001
Neutral	1755	223 (11.3%)	1.04 (0.89–1.21)	<.022		1.09 (0.92–1.29)	<.001
Sad	583	301 (34.1%)	4.21 (3.6–4.91)	<.001		4.97 (4.13–5.99)	<.001
Very sad	110	18 (14.1%)	1.33 (0.81–2.2)	.562		1.83 (1.01–3.32)	0.615
Age
<40	3459	631 (15.4%)	1			1
40–49	2695	626 (18.9%)	1.27 (1.13–1.44)	<.001		1.46 (1.27–1.67)	<.001	<.001
50–59	6295	1643 (20.7%)	1.43 (1.29–1.58)	<.001		2.11 (1.88–2.36)	<.001
60–69	5071	266 (5%)	0.29 (0.25–0.33)	<.001		0.49 (0.41–0.57)	<.001
70+	2865	20 (0.7%)	0.04 (0.02–0.06)	<.001		0.11 (0.07–0.18)	<.001
Missing	1964	265 (11.9%)	0.74 (0.63–0.86)	.014		1.28 (1.08–1.52)	<.001
Sex
Female	5255	1941 (27%)	1			1
Male	17 094	1510 (8.1%)	4.18 (3.88–4.5)	<.001		4.51 (4.13–4.91)	<.001
App usage duration
(Continuous)	22 379	3451 (13.4%)	1 (0.99–1)	.02		1.01 (1–1.01)	<.001
Weight difference
(Continuous)	22 379	3451 (13.4%)	1.47 (1.42–1.52)	<.001		1.43 (1.37–1.49)	<.001
Blood pressure (pre-dialysis)
Normal	2323	265 (10.2%)	1
Low	6711	840 (11.1%)	0.91 (0.79–1.06)	.001	<.001
High	13 315	2346 (15%)	1.41 (1.29–1.53)	<.001
Blood pressure (post-dialysis)
Normal	3223	290 (8.3%)	1			1
Low	9049	1130 (11.1%)	0.72 (0.63–0.83)	<.001	<.001	0.39 (0.32–0.47)	<.001	<.001
High	10 077	2031 (16.8%)	1.61 (1.49–1.75)	<.001		1.69 (1.55–1.84)	<.001
Session duration
(Continuous)	22 379	3451 (13.4%)	1.06 (1.05–1.07)	<.001		1.03 (1.03–1.04)	<.001

Abbreviation: TTD, technically troubled dialysis.