Table 1 Characteristics of all participants with and without cognitive impairment
Characteristics | With cognitive impairment (n = 340) | Without cognitive impairment (n = 56) | X2 a | Z b | P |
|---|---|---|---|---|---|
Age (year) | 101 (91, 103) | 92 (84, 102) | -3.246 | 0.001 | |
Body mass index (kg/m2) | 18 (16,21) | 19 (17, 22) | -1.696 | 0.090 | |
Education level, n (%) | 3.607 | 0.307 | |||
Illiteracy | 330(97.1) | 55(98.2) | |||
Primary school | 1(0.3) | 0(0) | |||
High school | 9(2.3) | 1(1.8) | |||
Race, n (%) | 1.822 | 0.610 | |||
Han | 303(89.1) | 53(94.6) | |||
Others | 37(10.9) | 3(5.4) | |||
Diabetes | 22(6.5) | 5(8.9) | 0.457 | 0.499 | |
Coronary heart disease, n (%) | 14(4.1) | 3(5.4) | 0.180 | 0.672 | |
Total type I collagen n-terminal elongation peptide (ug/L) | 69.0 (52.0, 90.0) | 63.0 (50.3, 76.8) | -1.595 | 0.111 | |
β-crossLaps (ng/ml) | 0.34 (0.21, 0.52) | 0.31 (0.17, 0.49) | -1.238 | 0.216 | |
Osteocalcin (ng/ml) | 28.9 (19.9, 39.4) | 26.8 (18.3, 33.9) | -1.351 | 0.177 | |
Parathyroid hormone (pg/ml) | 43.4 (31.5, 56.2) | 38.6 (28.5, 48.8) | -1.890 | 0.059 | |
25-hydroxyvitamin-D3 (ng/ml) | 22.3 (17.2, 27.9) | 24.1 (19.8, 28.7) | -1.538 | 0.124 | |
Phosphonium ion (mmol/L) | 1.08 (0.97, 1.18) | 1.05 (0.97, 1.19) | -0.425 | 0.671 | |
Calcium ion (mmol/L) | 2.45 (2.16, 2.31) | 2.25 (2.18, 2.31) | -0.985 | 0.325 | |
Progesterone (nmol/L) | 0.43 (0.10, 0.89) | 0.32 (0.10, 0.57) | -2.372 | 0.018 | |
Prolactin (ug/L) | 12.9 (10.3, 17.6) | 10.8 (8.6, 14.4) | -3.341 | 0.001 | |
Estradiol (pmol/L) | 18.4 (18.4, 44.9) | 18.4 (18.4, 29.8) | -2.537 | 0.011 | |
Testosterone (nmol) | 0.35 (0.15, 0.63) | 0.35 (0.11, 0.73) | -0.175 | 0.861 | |
Human chorionic gonadotropin (U/L) | 2.44 (1.36, 4.00) | 2.26 (1.17, 3.36) | -1.576 | 0.115 | |
Luteinizing hormone (mlU/ml) | 36.0(28.1, 45.8) | 34.4(28.3, 44.2) | -0.992 | 0.357 | |
Follicle stimulating hormone (IU/L) | 80.8 (62.7, 100.8) | 79.3 (63.1, 100.3) | -0.126 | 0.900 | |
Mini Mental State Examination | 8.5 (6.0, 12.0) | 21.0 (19.0, 25.0) | -12.016 | < 0.001 |