Sex ratio at birth (Multiple and Singleton) in General Hospital Calabar between 2006 -2012 – M. E. Kooffreh and P.I. Ogar
Documented information on sex ratio at birth in Nigeria is limited, recent data reports a sex ratio of 108:100 and 96:100 for Ibadan and Lagos respectively. There is a need to determine the sex ratio at birth in populations South-south Nigeria since variations have been observed in the sex ratios of different populations . Therefore this study seeks to assess retrospectively the trends of sex ratio at birth using General Hospital, Calabar as a case study. Ethical approval for the study was granted by the Ministry of Health Calabar Research Ethics Review Committee. Data was obtained from birth records between 2006 and 2012 in the records unit of the General Hospital Calabar. Analysis revealed a sex of 102:100 for both multiple and single birth, 70.4 for multiple birth only and 103.5 for single birth. Over all 6818 live births were recorded from January 2006 to December 2012. The average sex ratio for the 7 years pooled together was 102.4:100 for both multiple and single birth, 70.4:100 for multiple births only and 103.5:100 for single birth only. The analysis of this ratio pooled together also did not show significant deviation X2 =5.00, 73.27 and 4.57 for multiple and single birth, multiple births only and single birth respectively and df=6. The average sex ratio for General Hospital Calabar showed more males were born than females for multiple and single birth pooled together (3449 males and 3369 females) and single birth only (3368 male and 3254 females), while multiple birth (81 males and 115 females) showed more females birth. When pooled together, the results produced an average value of 102.4:100, and 103.5:100 for multiple and single birth and single birth respectively, which shows slightly more males than females. This study reveals that on the average 102.4 male deliveries occur for every 100 females deliveries in General Hospital, Calabar showing a higher male to female sex ratio.