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 2

Bibliometric analyses by journal and first author gender.

	JBJS			BJJ
	Woman	Man	value	Woman	Man	value
Author number	4.7 ± 2.5	4.6 ± 2.3	0.81	4.7 ± 2.1	4.3 ± 2.1	0.11
Number of institutions	2.3 ± 1.6	2.2 ± 1.9	0.12	2.3 ± 1.4	2.0 ± 1.4	0.21
Number of countries	1.2 ± 0.5	1.2 ± 0.6	0.38	1.2 ± 0.4	1.2 ± 0.5	0.47
Number of citations (normalized)	5.07 ± 4.86	4.53 ± 5.34	0.073	4.01 ± 4.86	3.09 ± 3.28	0.18
Number of references	30.4 ± 18.7	30.4 ± 22.6	0.61	28.6 ± 16.6	26.2 ± 18.2	0.08
Number of pages	7.8 ± 2.5	8.0 ± 2.9	0.57	6.4 ± 2.2	5.4 ± 1.9	0.00012
Corresponding author position (standardized)	0.45 ± 0.34	0.43 ± 0.32	0.69	0.45 ± 0.31	0.41 ± 0.29	0.59

Values are mean ± 1 standard deviation.