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Genus

Journal of Population Sciences

Table 4 The calendar effect on the daily births pooling macro-regions

From: One day is not as good as another…at least not across the entire territory of Italy: an analysis of the differences in the daily distribution of births across Italian macro-regions, 1999–2016

Variables

1—M

2—F

IRR

S.E.

IRR

S.E.

Day of the month

 1

0.979***

(0.005)

0.974***

(0.005)

 2

0.989**

(0.005)

0.986***

(0.005)

 3

1.004

(0.005)

1.001

(0.005)

 4

1.005

(0.005)

1.003

(0.005)

 5

1.001

(0.005)

0.993

(0.005)

 6

0.994

(0.005)

0.984***

(0.005)

 7

0.996

(0.005)

0.991*

(0.005)

 8

0.994

(0.005)

0.998

(0.005)

 9

0.989**

(0.005)

0.984***

(0.005)

 10

0.991*

(0.005)

0.996

(0.005)

 11

0.989**

(0.005)

0.993

(0.005)

 12

0.993

(0.005)

0.990**

(0.005)

 13

0.977***

(0.005)

0.973***

(0.005)

 14

0.985***

(0.005)

0.982***

(0.005)

 15

Ref

Ref

 16

0.991*

(0.005)

0.988**

(0.005)

 17

0.966***

(0.008)

0.962***

(0.008)

 18

1.005

(0.005)

1.006

(0.005)

 19

1.000

(0.005)

0.994

(0.005)

 20

1.010**

(0.005)

1.005

(0.005)

 21

0.996

(0.005)

0.994

(0.005)

 22

0.984***

(0.005)

0.986***

(0.005)

 23

0.993

(0.005)

0.990*

(0.005)

 24

1.000

(0.005)

1.004

(0.005)

 25

0.982***

(0.005)

0.979***

(0.005)

 26

0.985***

(0.005)

0.987**

(0.005)

 27

1.000

(0.005)

0.997

(0.005)

 28

0.999

(0.005)

0.993

(0.005)

 29

0.983***

(0.005)

0.974***

(0.005)

 30

0.986***

(0.005)

0.984***

(0.005)

 31

0.985**

(0.006)

0.974***

(0.006)

Day of the week

 Sunday

0.692***

(0.002)

0.686***

(0.002)

 Monday

0.988***

(0.002)

0.985***

(0.002)

 Thursday

1.015***

(0.002)

1.013***

(0.002)

 Wednesday

Ref

Ref

 Tuesday

1.043***

(0.002)

1.041***

(0.003)

 Friday

0.829***

(0.002)

0.823***

(0.002)

 Saturday

1.000

(0.002)

1.000

(0.002)

 Fri_17

0.971***

(0.010)

0.968***

(0.010)

 End/first of the year

0.750***

(0.008)

0.752***

(0.008)

 Civil feast

0.777***

(0.006)

0.777***

(0.007)

 Christmas

0.746***

(0.006)

0.732***

(0.006)

 Other rel. feast

0.770***

(0.004)

0.759***

(0.005)

 All Souls’ day

0.844***

(0.012)

0.836***

(0.012)

 GDP

1.000***

(0.000)

1.000***

(0.000)

Caesarean rate (categorized)

 1st quartile

Ref

Ref

 2nd quartile

1.035***

(0.003)

1.038***

(0.003)

 3rd quartile

1.096***

(0.005)

1.102***

(0.006)

 4th quartile

0.994

(0.009)

1.001

(0.007)

Interaction term

 2nd quartile × 17th day

1.003

(0.010)

0.993

(0.010)

 3rd quartile × 17th day

0.967***

(0.010)

0.986

(0.010)

 4th quartile × 17th day

0.961***

(0.009)

0.957***

(0.010)

 N

31,045

31,045

 pseudo R2

0.204

0.203

 Likelihood-ratio test of alpha = 0

(chi-p value)

7955.6 (0.000)

7503.6 (0.000)

  1. Controlling for month of birth, year fixed effects, and macro-region fixed effects. Standard errors in parentheses corrected for cluster for day month combination
  2. *p < 0.10, **p < 0.05, ***p < 0.01
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