Table 2.

Comparison of the OR of IDH over 3 months by percentage of SMM (kg) to WT (kg)

Variable	OR (95% CI) of IDH among groups divided by SMM/WT
	Low (reference)	Middle	High
Unadjusted	Reference	0.37 (0.16–0.85)a	0.08 (0.02–0.28)b
Multivariable regressionc	Reference	0.30 (0.10–0.88)a	0.06 (0.01–0.29)b
IPTWc	Reference	0.83 (0.69–1.00)	0.71 (0.59–0.85)b

Patients were grouped by rank numbering in order of the percentage of SMM (kg), measured by bioimpedance analysis, to WT (kg), as tertile groups of low, middle, and high percentage of SMM to WT. OR to IDH were analyzed using logistic models before and after weighting.

CI, confidence interval; IDH, intradialytic hypotension; IPTW, inverse probability of treatment weighting; OR, odds ratio; SMM, skeletal muscle mass; SMM/WT, percentage of SMM to WT; WT, dry body weight.

^ap > 0.001, p < 0.05.

^bp < 0.001.

^cAdjusted for age, sex, diabetes mellitus, cardiovascular comorbidities (chronic heart failure or ischemic heart disease), cardiac index, and ratio of the amount of ultrafiltration to body weight.