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. Author manuscript; available in PMC: 2023 Jul 19.
Published in final edited form as: N Engl J Med. 2023 Jan 19;388(3):240–250. doi: 10.1056/NEJMoa2206297

Table 3.

Variable Estimates for Individual Latent Growth Curve Models of 2-Year Outcomes.*

Model Appearance Congruence Depression Anxiety§ Positive Affect Life Satisfaction
value (95% confidence interval)
Unconditional model: time
Intercept mean 2.99 (2.90 to 3.08) 15.46 (14.27 to 16.70) 59.58 (58.22 to 60.68) 42.93 (41.82 to 44.03) 40.12 (38.99 to 41.26)
Intercept variance 0.35 (0.27 to 0.50) 86.23 (68.13 to 106.85) 17.84 (11.38 to 24.54) 63.50 (46.23 to 81.79) 75.21 (59.76 to 93.98)
Slope mean 0.48 (0.42 to 0.54) −1.27 (−1.98 to −0.57) −1.46 (−2.13 to −0.79) 0.80 (0.08 to 1.54) 2.32 (1.64 to 3.00)
Slope variance 0.11 (0.07 to 0.15) 19.44 (12.23 to 27.14) 17.84 (11.38 to 24.54) 17.98 (9.25 to 27.57) 20.33 (14.12 to 27.70)
Conditional model
Time
 Intercept mean 2.59 (1.91 to 3.27) 20.01 (10.79 to 29.48) 60.82 (53.56 to 67.95) 47.27 (38.93 to 55.81) 38.86 (29.90 to 47.75)
 Intercept variance 0.32 (0.25 to 0.42) 80.92 (63.35 to 100.47) 114.74 (91.96 to 138.23) 56.96 (41.19 to 74.75) 71.93 (57.15 to 90.22)
 Slope mean 0.51 (0.07 to 0.96) −0.92 (−3.82 to −0.06) −1.95 (−3.81 to −0.09) 1.79 (0.14 to 3.43) 4.54 (2.66 to 6.43)
 Slope variance 0.10 (0.06 to 0.14) 18.81 (11.71 to 26.34) 18.37 (11.78 to 25.63) 17.97 (9.29 to 27.66) 19.74 (13.61 to 27.06)
Time-invariant effects on intercept
 Baseline age 0.02 (−002 to 0.06) −0.23 (−0.08 to 0.36) −0.20 (−0.78 to 0.38) −0.32 (−0.84 to 0.21) 0.06 (−0.49 to 0.62)
 Designated sex at birth** −0.12 (−0.31 to 0.06) 1.74 (−0.69 to 4.09) 0.05 (−2.37 to 2.49) −1.26 (−3.53 to 0.91) −2.36 (−4.89 to 0.18)
 Racial and ethnic identity†† 0.19 (0.03 to 0.36) −2.60 (−4.82 to −0.32) −2.22 (−4.48 to 0.06) 2.30 (0.22 to 4.38) 1.70 (−0.58 to 3.98)
 Early gender-affirming care‡‡ 0.70 (0.35 to 1.04) −5.88 (−9.67 to −1.96) −7.41 (−11.30 to −3.52) 5.34 (1.70 to 8.98) 7.55 (2.82 to 12.28)
Time-invariant effects on slope
 Baseline age 0.00 (−0.03 to 0.03) −0.04 (−0.18 to 0.10) −0.02 (−0.15 to 0.12) −0.03 (−0.15 to 0.10) −0.09 (−0.22 to 0.05)
 Designated sex at birth** 0.03 (−0.09 to 0.15) 1.91 (0.33 to 3.50) 1.56 (0.01 to 3.10) −0.43 (−2.10 to 1.31) −1.86 (−3.49 to −0.24)
 Racial and ethnic identity†† −0.10 (−0.20 to 0.01) 1.70 (0.23 to 3.15) 0.62 (−0.77 to 1.98) −1.42 (−2.98 to 0.13) −1.08 (−2.52 to 0.36)
 Early gender-affirming care‡‡ −0.42 (−0.66 to −0.19) −0.73 (−3.41 to 1.93) 0.04 (−2.53 to 2.59) −0.78 (−3.56 to 2.06) −1.08 (−4.01 to 1.86)
*

Shown are unstandardized variable estimates with 95% confidence intervals. Slope means indicate change over time, and slope variances indicate heterogeneity within the sample.

Scores on the Appearance Congruence subscale of the Transgender Congruence Scale range from 1 to 5, with higher scores indicating greater appearance congruence.

Scores on the Beck Depression Inventory–II range from 0 to 63, with scores of 20 to 28 indicating moderate depression and scores of 29 to 63 indicating severe depression.

§

T scores on the Revised Children’s Manifest Anxiety Scale (Second Edition) have a mean of 50 and a standard deviation of 10, with scores of 60 or more indicating clinical levels of anxiety.

T scores for the Positive Affect measure from the NIH (National Institutes of Health) Toolbox Emotion Battery have a mean of 50 and a standard deviation of 10, with higher scores indicating greater positive affect.

T scores for the Life Satisfaction measure from the NIH Toolbox Emotion Battery have a mean of 50 and a standard deviation of 10, with higher scores indicating greater life satisfaction.

**

Coding for designated sex at birth was as follows: 0 = assigned female at birth (reference) and 1 = assigned male at birth.

††

Coding for racial and ethnic identity was as follows: 0 = non-Latinx or non-Latine White (reference) and 1 = other racial and ethnic identities.

‡‡

Coding for early gender-affirming care was as follows: 0 = initiated GAH in later puberty (Tanner stage 4 or 5) (reference) and 1 = initiated GAH in early puberty (Tanner stage 2 or 3).