Skip to main content

Table 1 Characteristics, hemoglobin concentration and correlates of Hb of study sample (g/L)

From: Hemoglobin levels and anemia evaluation during pregnancy in the highlands of Tibet: a hospital-based study

   

Multiple linear regression analysisd

Characteristics

n (%)

Mean ± s.d. (95% CI) of Hb (g/L)

Coeff (95% CI)

P-value

Gestational agea

  

-0.25 (-0.44, -0.05)

0.012

   1st trimester

49 (12.9)

135.8 ± 20.9 (132.2, 143.8)

  

   2nd trimester

119 (31.3)

128.0 ± 21.0 (124.4, 132.2)

  

   3rd trimester

212 (55.8)

125.6 ± 18.3 (123.3, 128.5)

  

Age

  

-0.14 (-0.59, 0.30)

0.524

   <25

123 (32.4)

128.6 ± 20.0 (125.4, 132.9)

  

   25-30

163 (42.9)

128.0 ± 19.1 (125.4, 131.5)

  

   30+

93 (24.5)

125.7 ± 20.7 (122.3, 130.9)

  

Ethnicity

  

8.09 (1.68, 14.50)

0.013

   Tibetan

330 (86.8)

126.6 ± 20.2 (124.9, 129.4)

  

   Non-Tibetanb

50 (13.2)

134.6 ± 15.1 (130.8, 139.5)

  

Residence

  

5.66 (1.03, 10.30)

0.017

   Urban

234 (61.6)

125.9 ± 18.9 (124.1, 129.1)

  

   Ruralc

146 (38.4)

130.4 ± 20.9 (127.3, 134.4)

  

Parity

  

1.23 (-1.72, 4.17)

0.414

   0

173 (45.5)

127.4 ± 19.1 (124.7, 130.6)

  

   1

120 (31.6)

126.4 ± 21.2 (123.0, 130.9)

  

   2+

87 (22.9)

130.5 ± 18.9 (126.8, 135.2)

  

Annual income ($)

  

10.65 (3.04, 18.25)

0.006

   <264

49 (12.9)

119.8 ± 22.6 (111.0, 128.5)

  

   264+

331(87.1)

128.8 ± 19.5 (126.8, 131.0)

  

Total

380 (100.0)

127.6 ± 19.8 (125.7, 129.6)

  
  1. aGestational age is in logarithmic scale
  2. bNon-Tibetan include Han, Hui, Menba, Luoba and Naxi nationalities residing permanently in Tibet
  3. cRural includes agricultural and pastoral areas
  4. dCoeff: regression coefficient; CI: Confidence Interval