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Table 1 Samples demographic characteristics across tertile (Q) of DII for 150 women in Beijing Northern Hospital

From: Association between dietary inflammatory index and bone density in lactating women at 6 months postpartum: a longitudinal study

Characteristics Tertiles of DII p a
Q1(n = 49) Q2(n = 51) Q3(n = 50)
Age, years 32.94 (4.67) 31.27 (3.6) 31 (4.3) 0.120
BMI6,kg/m2 22.2 (3.75) 22.93 (3.53) 23.5 (3.63) 0.331
Educational level, n,% 0.641
 High school or below 4 (7.1) 5 (9.8) 1 (2.0)  
 College 22 (45.2) 29 (56.1) 25 (49.2)  
 Postgraduate or up 23 (47.6) 17 (34.1) 24 (48.8)  
Time spent for physical activity, n,% 0.379
 < 1 h/week 16 (33.3) 10 (20.5) 16 (31.6)  
 1-2 h/week 25 (50.0) 31 (61.4) 24 (47.4)  
 2-4 h/week 6 (11.9) 6 (11.4) 10 (21.1)  
 4-6 h/week 2 (4.8) 4 (6.8) 0 (0)  
 T0 −1.2 (0.79) −1.03 (0.77) −0.8 (0.91) 0.081
 T6 −1.26 (0.84) − 1.04 (0.79) − 0.76 (1.11) 0.127
 Energy intake kcal/d 3164.37 (1009.32) 2060.79 (806.64) 1345.41 (359.32) < 0.001
 Calcium supplement, g/d 2.82 (11.42) 0.37 (0.41) 0.25 (0.28) 0.208
 Vitamin D,IU/d 110.92 (144.09) 200.28 (305.16) 116.87 (172.46) 0.174
Multivitamin use, n,% 0.890
 Yes 29 (58.5) 32 (62.5) 32 (63.4)  
 No 20 (41.5) 19 (37.5) 18 (36.6)  
 METs 10.7 (20.47) 8.8 (14.38) 3.74 (4.5) 0.142
 Menarche, age, years 13.42 (1.63) 12.91 (1.79) 13.36 (1.52) 0.390
 Pregnancy 1.97 (1.21) 1.58 (0.83) 1.52 (0.76) 0.100
 Parity, times 1.69 (1.19) 1.27 (0.45) 1.24 (0.44) 0.030
Calf Cramp, n,% 0.181
 Yes 18 (34.1) 9 (17.1) 13 (26.8)  
 No 31 (65.9) 42 (73.2) 37 (65.9)  
Feeding styles (0-6 month), n,% 0.771
 Breastfeeding 26 (61.9) 27 (65.9) 28 (68.3)  
 Mixed feeding 14 (33.3) 11 (26.8) 9 (22.0)  
 Artificial feeding 2 (4.8) 3 (7.3) 4 (9.8)  
Complementary foods, n,% 0.920
 Yes 43 (88.3) 45 (87.8) 43 (85.4)  
 No 6 (11.9) 6 (12.2) 7 (14.6)  
 Time of Complementary food 5.56 (0.52) 5.42 (0.55) 5.55 (0.63) 0.571
  1. Data are mean (SD) for normally distributed variables and % (n) for categorical variables.
  2. Note. BMI6 = BMI (kg/m2) at 6 months postpartum; T0 = baseline T-score at 1 month postpartum; T6 = follow-up T-score at 6 months postpartum
  3. a One-way analysis of variance (ANOVA) was used for difference in participants’ characteristics across tertiles of DII and chi-square test for categorical variables