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Table 2 Low birth weight rate and other municipal characteristics depending on municipal socioeconomic deprivation levels

From: Analysis of association between low birth weight and socioeconomic deprivation level in Japan: an ecological study using nationwide municipal data

Characteristics

Quintile 1 (Least deprived, n = 338)

Quintile 2 (n = 337)

Quintile 3 (n = 337)

Quintile 4 (n = 337)

Quintile 5 (Most deprived, n = 338)

Median (IQR)

Median (IQR)

Median (IQR)

Median (IQR)

Median (IQR)

Low birth weight rate*

91.1 (82.9–101.7)

93.1 (85.0 – 102.5)

94.2 (87.7 – 101.6)

95.7 (87.4 – 104.0)

97.7 (87.9 – 107.5)

Birth rate†

643.5 (493.7 – 815.8)

656.5 (521.7 – 781.5)

639.3 (525.7 – 755.4)

660.3 (537.4 – 775.7)

684.9 (563.2 – 820.9)

Proportion of women aged 15–49 years old (%)

17.9 (15.5 – 21.4)

18.4 (15.7 – 20.6)

17.8 (16.0 – 20.0)

18.3 (16.1 – 20.0)

17.9 (16.0 – 20.0)

Population density (population per hectare)

1.7 (0.4 – 14.6)

2.2 (0.4 – 8.2)

2.1 (0.7 – 6.6)

2.2 (0.8 – 7.0)

2.1 (0.8 – 8.0)

Number of physicians working in an obstetrics and gynecology department†

0.0 (0.0 – 6.4)

2.3 (0.0 – 7.1)

1.8 (0.0 – 7.3)

3.1 (0.0 – 8.2)

2.8 (0.0 – 8.6)

Number of medical clinics †

65.0 (53.5 – 86.5)

68.6 (56.5 – 83.5)

67.8 (55.8 – 81.2)

68.7 (54.0 – 86.5)

70.6 (53.3 – 87.4)

Number of hospitals†

3.3 (0.0 – 6.7)

4.4 (0.0 – 8.1)

6.4 (3.4 – 9.7)

7.1 (3.8 – 10.6)

9.5 (5.2 – 13.6)

  1. *Number of low birth weight infants per 1,000 birth-years
  2. †Number per 100,000 persons