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. Author manuscript; available in PMC: 2017 Dec 1.
Published in final edited form as: Psychoneuroendocrinology. 2016 Sep 24;74:269–277. doi: 10.1016/j.psyneuen.2016.09.012

Table 1.

Means, standard deviations, and frequencies of demographic, medical, and treatment variables by study group; ER=estrogen receptor; PR=progesterone receptor; HER2/neu=human epidermal growth factor.

Variable n Total Control Intervention p

Age at diagnosis (years) 51 49.67 (7.15) 50.83 (6.84) 48.71 (7.37) 0.298

Race/ethnicity 51 0.645
        White non-Hispanic 39 (76.5%) 19 (82.6%) 20 (71.4%)
        Hispanic 6 (11.8%) 2 (8.7%) 4 (14.3%)
        African American 6 (11.8%) 2 (8.7%) 4 (14.3%)

Employment Status 51 0.258
        Not employed 6 (11.8%) 4 (17.4%) 2 (7.1%)
        Employed 45 (88.2%) 19 (82.6%) 26 (92.9%)

Education (years) 51 15.61 (2.50) 15.22 (2.59) 15.93 (2.42) 0.317

Income (thousands of dollars) 78.16 (53.56) 80.48 (71.23) 76.04 (31.35) 0.788

Menopausal status 51 0.683
        Premenopausal 26 (51.0%) 11 (47.8%) 15 (52.6%)
        Postmenopausal 25 (49.0%) 12 (52.2%) 13 (46.4%)

Stage 51 0.538
        0 10 (19.6%) 4 (17.4%) 6 (21.4%)
        I 22 (43.1%) 10 (43.5%) 12 (42.9%)
        II 17 (33.3%) 9 (39.1%) 8 (28.6%)
        III 2 (3.9%) 0 (0.0%) 2 (7.1%)

Positive lymph nodes 51 0.90 (3.02) 0.17 (4.91) 1.5 (3.99) 0.120

Size of tumor (cm) 23 2.07 (1.29) 2.12 (1.09) 1.02 (1.47) 0.864

ER status 43 0.841
        Positive 38 (88.4%) 17 (89.5%) 21 (87.5%)
        Negative 5 (11.6%) 2 (10.5%) 3 (12.5%)

PR status 36 0.498
        Positive 26 (72.2%) 11 (78.6%) 15 (68.2%)
        Negative 10 (27.8%) 3 (21.4%) 7 (31.8%)

HER2/neu status 24 0.324
        Positive 7 (29.2%) 4 (40.0%) 3 (21.4%)
        Negative 17 (70.8%) 6 (60.0%) 11 (78.6%)

Procedure type 51 0.357
        Lumpectomy 23 (45.1%) 12 (52.2%) 11 (39.3%)
        Mastectomy 28 (54.9%) 11 (47.8%) 17 (60.7%)

Received chemotherapy 50 0.854
        Yes 28 (56.0%) 12 (54.6%) 16 (57.1%)
        No 22 (44.0%) 10 (45.5%) 12 (42.9%)

Received radiation therapy 48 0.096
        Yes 26 (54.2%) 8 (40.0%) 18 (64.3%)
        No 22 (45.8%) 12 (60.0%) 10 (35.7%)

Received endocrine therapy 50 0.852
        Yes 38 (76.0%) 17 (77.3%) 21 (75.0%)
        No 12 (24.0%) 5 (22.7%) 7 (25.0%)

Note. Means, standard deviations, and frequencies of demographic, medical, and treatment variables by study group; ER=estrogen receptor; PR=progesterone receptor; HER2/neu=human epidermal growth factor.