Table 1:

Average monthly incomes of dentists by gender and linear regression analyses of difference in average monthly incomes by gender (N=240).

	Male	Female	p-value
Overall	n = 120	n = 120
Mean ± SD	19,111.3 ± 8,780.2	21,722.3 ± 8,466.9	0.020†
Median (IQR)	13,516.7 (18,208.3)	26,166.7 (16,510.0)	0.451*
Min. – Max.	9,033.3 – 33,266.7	9,250 – 32,666.7
Subgroups
Public	n = 75 (62.5%)	n = 45 (37.5%)
Mean ± SD	12,648.7 ± 2,368.2	11,143.8 ± 1,555.7	<0.001‡
Median (IQR)	12,700.0 (1,966.7)	11,333.3 (3,006.7)	<0.001*
Min. – Max.	9,033.3 – 20,000	9,250 – 13,333.3
Private	n = 45 (37.5%)	n = 75 (62.5%)
Mean ± SD	29,882.2 ± 3,037.3	28,069.3 ± 2,228.1	<0.001‡
Median (IQR)	31,000.0 (5,400.0)	28,186.7 (3,150.0)	<0.001*
Min. – Max.	23,366.7 – 33,266.7	24,666.7 – 32,666.7

	Univariable linear regression			Multivariable linear regression
	Coefficient	95% CI	p-value	Coefficient	95% CI	p-value
Gender
Female		Reference			Reference
Male	-2,611	-4,804.5 -417.5	0.020	1,658.9	1,044.6 2,273.2	<0.001
Sector
Public		-			Reference
Private		-		17,079.56	16,465.3 17,693.8	<0.001
Constant	21,722.3	20,171.2 23,273.3	<0.001	11,047.53	10,478.1 11,617.0	<0.001

SD, standard deviation; IQR, interquartile range; Min., minimum; Max., maximum;

CI, confidence interval; %, percentage by column

^†Independent samples t-test with equal variances

^‡Independent samples t-test with unequal variances

*Two-sample Wilcoxon rank-sum test.