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Department of Pediatric Endocrinology and Institut National de la Santé et de la Recherche Médicale Unité 561 (J.-C.C., J.-L.C., I.B.-S.) and Department of Biostatistics (E.E., J.C.), Groupe Hospitalier Cochin-Saint Vincent de Paul and Faculté de Médecine René Descartes Paris 5, 75674 Paris, France; Department of Pediatric Endocrinology (S.C.), Hôpital Armand Trousseau, 75571 Paris, France; Department of Pediatric Endocrinology (M.T.), Hôpital des Enfants, 31059 Toulouse, France; Department of Pediatric Endocrinology (J.L.), Hôpital Robert Debré, 75935 Paris, France; Department of Pediatric Endocrinology (M.N.), Hôpital Debrousse, 69322 Lyon, France; and Department of Pediatric Endocrinology (R.B.), Hôpital de Bicêtre, 94275 Le Kremlin Bicêtre, France
Address all correspondence and requests for reprints to: Professor Jean-Claude Carel, Pediatric Endocrinology and Institut National de la Santé et de la Recherche Médicale Unité 561, Groupe Hospitalier Cochin-Saint Vincent de Paul, 82 av Denfert Rochereau, 75014 Paris, France. E-mail: carel{at}paris5.inserm.fr.
| Abstract |
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| Introduction |
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Treatments to promote growth in girls with Turners syndrome aim to reduce the impact of short stature on psychosocial functioning and quality of life. However, these aspects have not been evaluated in young adults after treatment completion. Several small studies have reported changes in psychosocial functioning and quality of life in adolescents and women with Turners syndrome (reviewed in Refs. 2 and 10). However, the effects on psychosocial functioning of height or height gain from GH treatment remain unclear (11, 12).
In this study, we aimed to evaluate the determinants of quality of life, by means of standardized questionnaires, in all young women with Turners syndrome who had been treated with GH in France. These women were treated during the 1990s and received GH regimens similar to those currently recommended for Turners syndrome.
| Subjects and Methods |
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Data relating to growth and features associated with Turners syndrome were collected before GH treatment and at follow-up visits (every 36 months) by the treating physicians. Karyotype, dysmorphic features, cardiac and renal malformations, associated morbidity, height, weight, age, bone age, pubertal stage, GH dose, frequency of injections, and associated treatments were analyzed (13). Height and weight were expressed as SD scores (SDSs), based on normative general population data (13) and Turners syndrome data (14). We estimated height gain from GH treatment by comparing attained and projected height, using Turners syndrome normative data (14).
In 2001 a postal survey was sent to all eligible patients. This survey included the validated French version of Medical Outcome Study Short Form 36 (SF-36) (15) the General Health Questionnaire 12 (GHQ-12) (16) and dealt with demographic characteristics, current health status (morbidity, medication), sexual intercourse experience, and expectations from GH treatment (patients were asked to give the minimum height gain they considered worthwhile for the further use of GH in Turners syndrome). The SF-36 contains eight subscales: general health (five items), physical functioning (10 items), limitations on usual role-related activities due to physical health problems (four items), bodily pain (two items), energy and fatigue (vitality, four items), limitations on usual role-related activities due to emotional or mental problems (three items), social functioning (two items), and emotional or mental health (five items). Scores for all eight subscales range from 0 to 100, with higher scores indicating better health or function. All items refer to the subjects functioning/status during the past 4 wk, except those for physical functioning and general health, which relate to the time at which the form is completed. We used the 12-item version of the general health questionnaire as a measure of psychological distress. Scores on this questionnaire range from 0 to 12, with a score of 3 or more identifying a probable case of minor psychiatric disorder such as anxiety or depression (16).
GH treatment
Treatment was generally initiated on the diagnosis of Turners syndrome. However, for the older patients, treatment was initiated when GH became widely available, in the early 1990s. The criteria for treatment discontinuation were a growth rate less than 3 cm/yr or a bone age of 13 yr or more.
Analysis of quality of life and statistical methods
The scores for the SF-36 scales are presented as absolute scores and SDSs, calculated by dividing the difference between the patients score and the mean of the general population of the same sex and age group by the SD of the general population group. French general population reference values for women aged 1824 yr were used (17). Pearson correlation coefficient was used to correlate GHQ-12 score (12 point scale) with the eight SF-36 scores (100-point scales).
Multiple regression models were constructed to identify factors associated with SF-36 scale (absolute) scores. These models included paternal socioprofessional class, educational level, and GHQ-12 scores (classified as high if the score was
3 or lower). Some of the scores for SF-36 scales were skewed, and residual plots from the corresponding regression analyses were checked for departure from normality. The
2 test (simple goodness of fit test) was used to compare the proportion of cases with GHQ-12 score of 3 or more with that for the general population. Calculations were performed with SAS software (18).
| Results |
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Eligible patients (participants and nonparticipants) had a mean age of 12 ± 2.5 yr at the start of treatment and used GH for a mean of 4.7 yr, at a mean dose of 0.8 IU/kg·wk (0.27 mg/kg·wk), administered as six or seven injections per week. They stopped treatment at the age of 16.7 ± 1.6 yr and received the questionnaire a mean of 6 yr later, at the age of 22.6 ± 2.6 yr. In the 72% of patients who had no spontaneous pubertal development, estrogen treatment was started at a mean age of 15 yr. Most of the remaining patients required estrogen treatment at a later stage to complete their pubertal development. The mean adult height for the whole group (participants and nonparticipants) was 150 ± 6.1 cm (range 127167 cm). Participants were a mean of 2.7 cm taller than nonparticipants (P < 0.005). Participants and nonparticipants were similar in all other characteristics.
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SF-36 scores in the 568 women with Turners syndrome were similar to those of women of the same age from the general population (Fig. 2
). If expressed as SDSs, these scores did not differ significantly from zero. The proportion of women with Turners syndrome who had a high GHQ-12 score (
3) was lower than that for the general population (24 vs. 31%, respectively, P < 0.001).
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| Discussion |
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This is, to our knowledge, the first study addressing the question of quality of life in patients with Turners syndrome using standardized questionnaires in a register-based population. The use of a standardized questionnaire made it possible to compare patients scores with those obtained recently for French women of the same age from the general population (17). Several limitations of our study should be pointed out. First, the 31% of patients who did not participate might have different quality-of-life characteristics from those who did and being on average 2.7 cm shorter might be of greater concern to them than to those who participated. Although this cannot be dismissed, we believe it is unlikely, given the lack of influence of height on quality of life in the rest of the population. Moreover, the response rate of 69% to an unsolicited questionnaire assessing personally intimate information is high and well within acceptable standards for similar surveys. Second, it could be argued that the SF-36 scale used was not sensitive enough to detect small changes in quality of life and that we might have missed important factors, such as height. Although we cannot exclude this possibility, we were able to detect several effects, including those of paternal socioprofessional background, educational level, and the presence of heart malformations or otological conditions. However, the SF-36 scales were not designed to detect the influence of height and the use of syndrome-specific quality-of-life measures addressing the relation between height and ability for daily life activities might have given different results. Altogether, the SF-36 has been used successfully in a variety of similar studies (19, 20). Third, the design of our study, in GH-treated patients, focused on young adults with this condition, and our conclusions may not be applicable to other age groups, in particular adolescents or older adults. It would have been interesting to study untreated women with Turners syndrome of a similar age. However, since the early 1990s, almost all children diagnosed with Turners syndrome are treated with GH in accordance with current international recommendations (9). Fourth, all data were obtained from routine examination in daily practice, and their reliability may be questioned. Last, whether our findings are generalizable to cultural contexts other than France remains to be established.
Several studies have assessed quality-of-life or psychosocial parameters in adults or youths with Turners syndrome (reviewed in Refs. 2 and 10). Most have concluded that self-image or social functioning is low (10, 21). Depression scores were high (22, 23) or low (24). However, the recruitment of these patients from medical clinics or patient support organizations certainly introduced biases. In children and adolescent girls with Turners syndrome, studies assessing the psychological benefits of increasing height by GH therapy have given inconsistent results (11, 12).
Our results have important implications for the care of children with Turners syndrome and, more generally, with conditions that limit growth. In Turners syndrome, height and the use of GH has been a major focus of health providers during the past 15 yr. Indeed, the patients studied here had a mean height of 150 cm, 68 cm greater than historical data on French Turners syndrome patients (14). A long-term untreated contemporary control would have been needed for an optimal assessment of the influence of GH on health-related quality of life. However, the variance of height of our patients (95% between 139 and 161 cm) was three times greater than the estimate of height gain by GH. Another possibility is that the intervention itself (GH treatment) rather than its result (height increment) might have improved perceived health-related quality of life, therefore obscuring the influence of height itself. However, given the limitation indicated above, we found no evidence suggesting that interventions that increase heights by 510 cm have an effect on quality of life. In addition, the lower quality of life of patients with higher expectations from GH treatment indicates a long-term negative impact of unduly high expectations, as previously suggested (25). Finally, we found that quality of life was significantly lower in patients with otological disorders. Otological disorders are common in Turners syndrome, affecting up to 70% of patients, and lead to hearing impairment in up to 90% of adult patients (2, 26, 27). In a placebo-controlled study (6) and in the Canadian long-term randomized, controlled trial (28), GH use was associated with an increase in frequency of otitis media by a factor of two or more. Our results therefore indicate that higher priority should be given to the care of otological problems in childhood and the prevention of their long-term consequences in adulthood.
In young adults with short stature, height has no detectable influence on quality of life (29). GH is increasingly used in GH-sufficient individuals with short stature, but quality of life has not been measured as an end point of these pharmacological interventions. Current estimates indicate adult height gains of 3.76 cm (30, 31, 32) that are unlikely to influence the quality of life in such individuals with short stature.
We conclude that quality of life, as assessed by SF-36, is normal and unaffected by height in young adults with Turners syndrome treated with GH. However, in the absence of a contemporaneous group of untreated patients with Turners syndrome, a beneficial effect of GH treatment irrespective of adult height attained cannot be ruled out. In that regard, our data raise the question as to whether GH treatment is justified in this patient population, given its constraints, costs, and potential side effects (33, 34, 35). Moreover, our results clearly indicate that greater attention should be paid to otological care and other specific needs in these patients, given the negative impact of otological problems on daily life. These findings also call into question the use of GH to treat other conditions involving short stature, associated with a specific diagnosis or idiopathic, for which GH is currently used without evaluation of the psychosocial impact of these demanding and costly treatments. Above all, our findings suggest that for current and future indications for GH treatment, research into the overall impact of pharmacological intervention is necessary.
| Acknowledgments |
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telain, Jean-Louis Chaussain, Maurice Chupin, Michel Colle, Jean-Benoît Cotton, Paul Czernichow, Albert David, Michel David, Marc De Kerdanet, Francois Despert, Pierre Doyard, Christine Fedou, Anne Fjellestad-Paulsen, Patrick Garandeau, Philippe Garnier, Frédéric Huet, Jean-Claude Job, Michel Lecornu, Juliane Léger, Bruno Leheup, Anne Lienhardt, Jean-Marie Limal, Guy-André Loeuille, Eric Mallet, Georges Malpuech, Roger Mariani, Chantal Metz, Catherine Naud-Saudreau, Jean-Louis Nivelon, Sylvie Nivot, Christian Pauwels, Marc Pétrus, Catherine Pienkowski, Olivier Puel, Odile Richard, Pierre Rochiccioli, Gilbert Simonin, Sylvie Soskin, Véronique Sulmont, Charles Sultan, Maïté Tauber, Jean-Edmond Toublanc, Kathy Wagner, Jacques Weill, and Catherine Wémeau. | Footnotes |
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First Published Online January 11, 2005
Abbreviations: GHQ-12, General Health Questionnaire 12; SDS, SD score; SF-36, Medical Outcome Study Short Form 36.
Received July 16, 2004.
Accepted January 4, 2005.
| References |
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This article has been cited by other articles:
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