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Table 1 General characteristics of the 1,362 participants with different vitamin D changes

From: Change of vitamin D status and all-cause mortality among Chinese older adults: a population-based cohort study

  Vitamin D change
  Deficiency
(n = 704)
No deficiency to deficiency
(n = 227)
Deficiency to no deficiency
(n = 215)
No deficiency
(n = 216)
P-value
Median (IQR)
Age, years 87.5(78.0–97.0) 79.0(72.0–88.5) 79.0(71.0–88.0) 81.5(72.0–89.0)  < 0.001
SBP, mmHg 141(128–160) 140(126–160) 140(125–150) 140(128–150) 0.067
DBP, mmHg 80(71–89) 80(71–90) 80(77–90) 80(71–88) 0.180
WC, cm 80.0(74.0–88.0) 83.0(76.0–90.0) 81.0(75.5–89.0) 79.0(73.0–84.0)  < 0.001
HGB, g/L 125.00(113.00–136.00) 130.00(119.00–140.00) 140.00(127.50–152.00) 129.00(114.00–142.00)  < 0.001
Alb, g/L 42.60(39.80–44.70) 43.20(41.00–45.25) 43.80(40.85–45.50) 43.80(41.80–45.62)  < 0.001
FBG, mmol/L 5.01(4.45–5.75) 4.94(4.39–5.82) 5.27(4.67–5.87) 4.89(4.01–5.50)  < 0.001
Creatinine, mmol/L 75.45(65.17–92.12) 79.40(68.65–92.30) 74.80(66.15–86.80) 80.30(69.17–94.65) 0.068
Uric acid, μmol/L 272.00(224.00–327.00) 296.00(253.50–344.50) 272.00(235.00–320.00) 314.00(264.00–380.50)  < 0.001
TC, mmol/L 4.78(4.17–5.51) 4.85(4.25–5.49) 4.48(3.96–5.09) 4.62(4.06–5.12)  < 0.001
TG, mmol/L 1.06(0.80–1.48) 1.07(0.80–1.50) 1.07(0.83–1.58) 0.95(0.75–1.37) 0.181
HDL-c, mmol/L 1.36(1.11–1.65) 1.42(1.17–1.65) 1.25(1.03–1.55) 1.42(1.18–1.66)  < 0.001
25(OH)D 2012, nmol/L 32.60(25.66–40.41) 58.90(53.91–66.67) 34.00(27.23–42.27) 63.92(56.38–75.07)  < 0.001
25(OH)D 2014, nmol/L 30.45(21.90–38.23) 36.80(31.35–42.80) 61.20(55.15–72.10) 65.35(57.50–75.93)  < 0.001
MMSE 24.00(16.00–29.00) 28.00(24.00–29.00) 27.00(22.00–29.00) 26.50(23.00–29.00)  < 0.001
N (%)
Age, years       < 0.001
  60–79 202(28.7) 115(50.7) 109(50.7) 97(44.9)  
  80–99 358(50.9) 87(38.3) 80(37.2) 95(44.0)  
   ≥ 100 144(20.5) 25(11.0) 26(12.1) 24(11.1)  
Sex       < 0.001
  Male 244(34.7) 133(58.6) 139(64.7) 145(67.1)  
  Female 460(65.3) 94(41.4) 76(35.3) 71(32.9)  
Currently married and living with spouse 231(32.8) 127(55.9) 116(54.0) 100(46.3)  < 0.001
Residence       < 0.001
  Rural 546(77.6) 171(75.3) 199(92.6) 199(92.1)  
  Urban 158(22.4) 56(24.7) 16(7.4) 17(7.9)  
Education       < 0.001
  Illiteracy 461(65.9) 99(44.4) 125(58.1) 111(52.1)  
   ≤ 6yrs 181(25.9) 89(39.9) 62(28.8) 72(33.8)  
   ≥ 7yrs 58(8.3) 35(15.7) 28(13.0) 30(14.1)  
Current/past drinking 119(16.9) 65(28.6) 42(19.5) 56(25.9)  < 0.001
Current/past smoking 130(18.5) 72(31.7) 46(21.4) 66(30.6)  < 0.001
Current/past exercise 109(15.5) 38(16.7) 43(20.0) 35(16.2) 0.482
Poor self-rated health 82(11.6) 29(12.8) 23(10.7) 21(9.7) 0.759
History of cardiac or cerebrovascular disease 116(16.5) 23(10.1) 43(20.0) 14(6.5)  < 0.001
  1. Data were expressed as median (interquartile range, IQR) or n (%). SBP systolic blood pressure, DBP diastolic blood pressure, WC waist circumference, HGB hemoglobin, Alb albumin, FBG fasting blood-glucose, TC total cholesterol, TG total triglyceride, HDL-c high density lipoprotein cholesterol, MMSE Mini-Mental State Examination