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Table 2 Descriptive statistics for oral function by CKD stage (N = 109)

From: Association among kidney function, frailty, and oral function in patients with chronic kidney disease: a cross-sectional study

  Overall Stage 3a Stage 3b Stage 4 Stage 5 p for trend
Oral function, mean ± SD or median (IQR) ODK (pa)/sec 6.0 (4.8–6.7) 6.2 (5.8–6.7) 6.0 (4.8–6.8) 6.2 (4.8–6.9) 5.4 (3.5–6.3) 0.113
ODK (ta)/sec 5.8 (4.9–6.4) 6.0 (5.2–6.5) 5.6 (5.1–6.3) 5.9 (4.9–6.6) 5.6 (4.7–6.2) 0.386
ODK (ka)/sec 5.2 (4.0–6.0) 5.6 (4.4–6.0) 5.5 (4.0–6.1) 5.2 (3.9–6.2) 5.0 (3.6–6.2) 0.459
Mastication ability 150.0 ± 61.5 166.0 ± 67.5 153.0 ± 66.0 142.7 ± 55.0 140.1 ± 62.2 0.161
RSST number of times 2.0 (1.0–4.0) 2.4 ± 1.8 2.7 ± 2.1 2.9 ± 2.5 2.1 ± 1.4 0.746
Tooth condition, median (IQR) Number of teeth 22.0 (9.0–26.0) 24.5 (15.8–26.0) 21.0 (6.0–26.0) 22.0 (9.8–28.0) 22.0 (10.5–27.0) 0.916
Functional teeth 28.0 (25.0–28.0) 27.0 (24.0–28.0) 28.0 (25.8–28.0) 28.0 (23.0–28.0) 27.0 (24.0–28.0) 0.717
  1. Jonckheere-Terpstra trend test
  2. ODK Oral diadochokinesis, RSST Repetitive saliva swallowing test