Table 2 Target model inferential statistics for ovulation rate and sexual behavior measurements.

From: A multi-site study of the relationship between photoperiod and ovulation rate using Natural Cycles data

 

3-over-6 Ovulation

Coverline Ovulation

LH Test

Ovulation

Natural Cycles Ovulation

Logged Libido

Logged Sex

Covariate

b (SE)

b (SE)

b (SE)

b (SE)

b (SE)

b (SE)

Sweden

(n = 56,936)

      

Intercept

0.0004 (0.148)

0.0002 (0.093)

−1.19 × 10–7 (0.196)

0.001 (0.235)

0.686 ( 0.095)***

0.185 (0.014)***

Age

0.014 (0.003)***

0.006 (0.002)***

−1.36 × 10–6 (0.004)

0.024 (0.004)***

−0.006 (0.002)**

−0.001 (0.0003)***

BMI Proxy

0.009 (0.003)**

0.004 (0.002)*

−3.36 × 10–6 (0.004)

0.016 (0.005)**

0.003 (0.002)

0.0003 (0.0003)

Cycle Length

0.017 (0.003)***

0.005 (0.002)**

−1.64 × 10–6 (0.004)

0.023 (0.004)***

−0.005 (0.002)**

−0.001 (0.0002)***

Day Length

0.0003 (0.00004)***

0.0004 (0.00003)***

−1.26 × 10–4 (0.00005)*

0.001 (0.00006)***

0.00002 (0.00002)

0.00001 (0.000003)***

United States

(n = 326,137)

      

Intercept

0.0001 (0.064)

0.000003 (0.071)

8.25 × 10–7 (0.087)

0.0004 (0.144)

0.640 (0.040)***

0.242 (0.006)***

Age

0.003 (0.001)***

0.0001 (0.001)

7.75 × 10–5 (0.001)

0.011 (0.003)***

−0.005 (0.001)***

−0.002 (0.0001)***

BMI Proxy

0.002 (0.001)

0.0001 (0.001)

1.61 × 10–5 (0.001)

0.008 (0.003)*

0.003 (0.001)***

−0.0001 (0.0001)

Cycle Length

0.007 (0.001)***

0.0001(0.001)

6.83 × 10–5 (0.002)

0.013 (0.002)***

−0.006 (0.001)***

−0.001 (0.0001)***

Day Length

0.001 (0.00004)***

0.002 (0.00004)***

1.56 × 10–4 (0.00005)**

0.004 (0.00009)***

0.0001 (0.00002)***

0.00002 (0.000003)***

  1. Day Length = number of minutes of ambient day light; BMI = body mass index; ***p ≤ .001; **p ≤ .01; *p ≤ .05.