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. Author manuscript; available in PMC: 2024 Sep 4.
Published in final edited form as: Birth Defects Res. 2024 Aug;116(8):e2390. doi: 10.1002/bdr2.2390

TABLE 2 |.

Unadjusted and adjusted geometric means and geometric mean ratios of red blood cell folate concentrations among non-pregnant and non-lactating women of reproductive age, 18–49 years, Ambala District, Haryana, India.

RBC folate, nmol/L
Characteristic n (unweighted) Unadjusted geometric mean (95% CI) Unadjusted geometric mean ratio (95% CI) Adjusted geometric mean (95% CI)a Adjusted geometric mean ratio (95% CI)
Total 775 546.3 (518.3, 575.8) 544.5 (518.3, 574.8)
Age (years)
  18–29 249 464.9 (438.9, 492.4) Referent 495.1 (463.4, 528.9) Referent
  30–39 307 566.7 (535.5, 599.7) 1.22 (1.12, 1.32) 554.7 (522.4, 588.9) 1.12 (1.02, 1.23)
  40–49 219 621.0 (576.8, 668.6) 1.34 (1.22, 1.47) 597.4 (554.6, 643.6) 1.21 (1.08, 1.35)
Religion
  Hinduism 693 543.1 (523.2, 563.8) Referent
  Islam 22 514.6 (411.9, 643.1) 0.95 (0.76, 1.19)
  Sikhism 60 601.5 (514.5, 703.2) 1.11 (0.94, 1.30)
Caste
  General 229 567.5 (529.2, 608.7) Referent
  Scheduled (caste, tribe) 279 542.2 (507.2, 579.6) 0.96 (0.87, 1.05)
  Other backward classes 267 535.4 (506.8, 565.7) 0.94 (0.86, 1.03)
Education
  None 160 546.5 (509.1, 586.7) Referent
  Primary 155 564.3 (521.3, 610.9) 1.03 (0.93, 1.15)
  Secondary 291 530.1 (497.7, 564.6) 0.97 (0.88, 1.07)
  Higher secondary and above 137 549.8 (504.0, 599.7) 1.01 (0.90, 1.13)
Occupation
  Earning 248 547.3 (512.6, 584.4) Referent
  Non-earning 513 544.0 (520.4, 568.6) 0.99 (0.92, 1.08)
Marital status
  Never married 109 427.9 (388.3, 471.4) Referent
  Married 620 570.4 (547.9, 593.7) 1.33 (1.20, 1.48)
  Divorced/widowed/separated 46 545.1 (483.3, 614.7) 1.27 (1.09, 1.49)
Parity
  Nulliparous 145 434.3 (401.2, 470.2) Referent 474.8 (431.9, 522.0) Referent
  Primiparous 79 521.0 (465.0, 583.8) 1.20 (1.04, 1.38) 549.0 (489.9, 615.2) 1.16 (1.00 b , 1.33)
  Multiparous 551 583.3 (558.9, 608.8) 1.34 (1.23, 1.47) 566.3 (543.0, 590.5) 1.19 (1.07, 1.33)
Diet
  Vegetarian 670 541.9 (520.9, 563.7) Referent
  Eggetarian 36 519.0 (461.8, 583.2) 0.96 (0.85, 1.08)
  Non-vegetarian 69 607.3 (541.4, 681.2) 1.12 (0.99, 1.27)
Having a ration card
  Yes 755 547.4 (527.9, 567.7) 1.04 (0.85, 1.26)
  No 20 527.8 (434.7, 640.8) Referent
Ration card category
  Below poverty line 277 532.5 (502.8, 563.9) Referent
  Above poverty line 477 556.5 (530.3, 584.0) 1.05 (0.97, 1.13)
  No ration card 20 527.8 (434.7, 640.8) 0.99 (0.81, 1.21)
PDS wheat purchase
  Yes 497 539.5 (516.3, 563.7) 1.02 (0.84, 1.25)
  No 255 564.7 (528.4, 603.5) 1.07 (0.87, 1.32)
  No ration card 20 527.8 (434.7, 640.8) Referent
Folic acid supplement use
  Yes 23 863.6 (685.4, 1088.2) 1.61 (1.27, 2.03) 817.8 (637.4, 1049.4) 1.52 (1.18, 1.96)
  No 752 538.1 (519.3, 557.5) Referent 539.1 (520.8, 558.0) Referent
Vitamin B12 supplement use
  Yes 20 835.1 (623.6, 1118.5) 1.54 (1.15, 2.07) 727.2 (547.2, 966.3) 1.34 (1.00 b , 1.79)
  No 755 540.8 (522.0, 560.3) Referent 542.8 (524.6, 561.6) Referent

Note: Statistically significant results are bolded.

Abbreviations: 95% CI, 95% confidence interval; PDS, public distribution system; RBC, red blood cell.

a

Adjusted for age, parity, folic acid use, and vitamin B12 use.

b

Value >1.