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. Author manuscript; available in PMC: 2016 Jul 5.
Published in final edited form as: Twin Res Hum Genet. 2015 Dec 22;19(1):35–46. doi: 10.1017/thg.2015.92

TABLE 2.

Religiousness in Danish Opposite-Sex and Same-Sex Twins

Yes No Do not know Crude OR (95% CI) Adjusteda OR (95% CI)
Cognition
Do you believe in God?
OS females 146 (35.9) 173 (42.5) 88 (21.6)
SS females 510 (36.9) 537 (38.9) 335 (24.2) 0.96 (0.75–1.21) 0.97 (0.76–1.23)
OS males 92 (26.3) 199 (56.9) 59 (16.9)
SS males 233 (27.3) 490 (57.4) 130 (15.2) 0.95 (0.71–1.27) 0.97 (0.72–1.29)
Do you believe in life after death?
OS females 151 (37.1) 144 (35.4) 112 (27.5)
SS females 522 (37.8) 496 (35.9) 364 (26.3) 0.97 (0.77–1.23) 0.99 (0.78–1.25)
OS males 74 (21.1) 193 (55.1) 83 (23.7)
SS males 207 (24.3) 476 (55.8) 170 (19.9) 0.84 (0.62–1.14) 0.83 (0.61–1.12)
Do you believe in re-incarnation?
OS females 70 (17.2) 230 (56.5) 107 (26.3)
SS females 255 (18.5) 747 (54.1) 380 (27.5) 0.92 (0.68–1.24) 0.94 (0.70–1.27)
OS males 37 (10.6) 246 (70.3) 67 (19.1)
SS males 98 (11.5) 596 (69.9) 159 (18.6) 0.91 (0.61–1.37) 0.92 (0.61–1.38)
Practice
Do you ever attend religious services?
OS females 298 (73.0) 109 (26.7) 1 (0.3)
SS females 988 (71.4) 394 (28.5) 1 (0.1) 1.08 (0.84–1.40) 1.11 (0.86–1.44)
OS males 214 (61.1) 135 (38.6) 1 (0.3)
SS males 498 (58.3) 353 (41.3) 3 (0.4) 1.12 (0.87–1.46) 1.20 (0.92–1.56)
Do you ever pray to God outside
    religious services?
OS females 221 (54.2) 181 (44.4) 6 (1.5)
SS females 747 (54.0) 615 (44.5) 21 (1.5) 1.01 (0.80–1.26) 1.00 (0.80–1.26)
OS males 142 (40.6) 204 (58.3) 4 (1.1)
SS males 318 (37.3) 528 (62.0) 6 (0.7) 1.15 (0.88–1.49) 1.16 (0.89–1.50)
Do you have your own way of
    connecting with the divine?
OS females 301 (74.0) 75 (18.4) 31 (7.6)
SS females 993 (71.9) 246 (17.8) 143 (10.4) 1.11 (0.86–1.44) 1.14 (0.88–1.47)
OS males 199 (56.9) 109 (31.1) 42 (12.0)
SS males 483 (56.6) 268 (31.4) 102 (12.0) 1.01 (0.78–1.30) 1.03 (0.79–1.33)
Importance
Is God important in your life?
OS females 275 (67.6) 125 (30.7) 7 (1.7)
SS females 948 (68.6) 404 (29.2) 30 (2.2) 0.95 (0.75–1.22) 0.96 (0.75–1.22)
OS males 172 (49.1) 175 (50.0) 3 (0.9)
SS males 438 (51.4) 405 (47.5) 10 (1.2) 0.92 (0.71–1.18) 0.95 (0.73–1.23)
Do you find that you get strength and
    comfort from religion?
OS females 92 (22.6) 250 (61.4) 65 (16.0)
SS females 364 (26.3) 838 (60.6) 180 (13.0) 0.82 (0.63–1.07) 0.81 (0.62–1.06)
OS males 73 (20.9) 252 (72.0) 25 (7.1)
SS males 151 (17.7) 638 (74.8) 64 (7.5) 1.23 (0.89–1.69) 1.23 (0.89–1.69)
Did God play a role in your life when
    you were 12?
OS females 279 (68.55) 106 (26.04) 22 (5.41)
SS females 971 (70.26) 325 (23.52) 86 (6.22) 0.92 (0.72–1.18) 0.91 (0.71–1.16)
OS males 198 (56.57) 136 (38.86) 16 (4.57)
SS males 467 (54.75) 351 (41.15) 35 (4.10) 1.08 (0.83–1.39) 1.09 (0.84–1.41)

Note: Values are numbers (percentages) stratified by sex and co-twin sex as well as odds ratios (ORs) with 95% confidence intervals (CIs) for opposite-sex versus same-sex twins answering “yes” compared with “no” or “do not know”. The “no” and “do not know” categories were combined when estimating ORs.

a

Adjusted for age at participation and parental education of the main provider in childhood.