Trends in Gender Authorship and Collaborations: A 30-Year Comparative Bibliometric Analysis of Manuscripts from The Journal of Bone and Joint Surgery and The Bone and Joint Journal

Table 3

Bibliometric analyses by journal and corresponding author gender.

	JBJS			BJJ
	Woman	Man	value	Woman	Man	value
Author number	4.8 ± 2.2	4.6 ± 2.3	0.53	4.7 ± 2.2	4.3 ± 2.1	0.14
Number of institutions	2.3 ± 1.5	2.3 ± 2.0	0.26	2.2 ± 1.5	2.0 ± 1.4	0.60
Number of countries	1.1 ± 0.4	1.2 ± 0.7	0.56	1.1 ± 0.3	1.2 ± 0.5	0.097
Number of citations (normalized)	4.87 ± 5.04	4.74 ± 5.51	0.71	3.52 ± 3.64	3.16 ± 3.53	0.56
Number of references	29.9 ± 15.9	31.1 ± 22.8	0.89	29.6 ± 17.6	25.8 ± 17.8	0.02
Number of pages	7.8 ± 2.3	8.0 ± 2.9	0.60	6.3 ± 2.2	5.4 ± 1.9	0.0007
Corresponding author position (standardized)	0.39 ± 0.29	0.44 ± 0.33	0.20	0.39 ± 0.29	0.43 ± 0.31	0.18

Values are mean ± 1 standard deviation.